Everest | 1991 SW Face

A Japan expedition to Everest in 1991 via SW Face, led by Kunaiki Yagihara. Summit reached on 21st December 1991. 18 members recorded.

Expedition Details

Field	Value
ID	1071
Imported	2026-03-06 18:04:49.359634
Expedition ID	EVER91401
Peak ID	EVER
Year	1991
Season	4
Host Country	1
Route 1	SW Face
Route 2	-
Route 3	-
Route 4	-
Nationality	Japan
Leaders	Kunaiki Yagihara
Sponsor	Gunma Mountaineering Federation Winter Mt. Sagarmantha SW Face Exp.
Success 1	False
Success 2	False
Success 3	False
Success 4	False
Ascent 1	-
Ascent 2	-
Ascent 3	-
Ascent 4	-
Claimed	False
Disputed	False
Countries	-
Approach	-
Basecamp Date	1991-11-11
Summit Date	1991-12-21
Summit Time	-
Summit Days	40
Total Days	94
Termination Date	1992-02-13
Termination Reason	4
Termination Notes	Abandoned at 8350m due to wind and Sherpas not willing to carry oxygen to C5
High Point (m)	8350
Traverse	False
Ski	False
Paraglide	False
Camps	5
Fixed Rope (m)	2800
Total Members	18
Summit Members	0
Member Deaths	0
Total Hired	25
Summit Hired	0
Hired Deaths	0
No Hired	False
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Taken	False
O2 Unknown	False
Other Summits	All 19 atop Pokalde
Campsites	BC(11/11,5350m),C1(01/12,6020m),C2(02/12,6500m),C3(05/12,6900m),C4(11/12,7600m),C5(08/01,8350m),xxx(21/12,8350m)
Route Notes	C1 at top of Icefall C2 in Cwm C3 at start of Lhotse Face C4 on Lhotse Face C5 on Lhotse Face High poin at SW Face. Started on icefall 16th: icefall very bad condition, seracs falling daily and had to make route everyday (had 4 icefall Sherpas). 3 Sherpas to C5 - no snow in Icefall or Cwm; only 1-2 cm snowfall - only hard ice. C2 made quickly after C1 because Koreans made route C1->C3 - snow cover. 21st Dec 2 members reached C4 site but very strong wind and tent poles broken when tried to pitch tent. After C5 attempt all down to BC for rest, then up again 1 Jan after strong winds abated. Every tent broken, sound of jet plane, tents lifted up, very difficult to stand when winds very strong, even sometimes at BC - and C2 10 tents, C3 2 tents, C4 1 tent, C1 4 tents, BC many tents; at BC 2 tents broken, C2 broken and 8 poles bent, C3 2 broken, C4 1 tent broken. 8th Jan C5 pitched by 2 members but 9th strong wind and down to C2. 15th Jan again 1 to C5 2 members but again down to C1 next day because of winds. By now 10 members and 10 Sherpas had reached C5 (3 Sherpas to C5 made 10 carries). 16 and 17th Jan all members to BC and rest and waiting for better weather. 25th Jan up again and 29th Jan 5 members tried to reach C5, 2 members got there but they also back to C4 on 6th Feb, but 7th Feb back to C2 because wind and because snow fall. After 2 days waiting at C2, decided to give up: no more oxygen in C5 and Sherpas not willing to carry loads of oxygen up to C5. If they would support members, we would have tried to make route above C5 to attack summit. Sherpas no longer keen to climb. Took 82 oxygen cylinders - 14 tons cargo to Lukla. Rope fixed - in icefall Japanese and Koreans fixed half and half. C2-C3 bottom face above - 500m C3-C4 - 1200m C4-C5 - 1100m _______ 2800m Before expedition Yagihara had 3 fears: cold, wind, falling stones but only wind was problem - not so much cold, not so much stone.
Accidents	3 frostbite but not loss, 1 member 3cm cut from stonefall on cheek
Achievement	-
Agency	Cosmo Treks
Commercial Route	False
Standard Route	-
Primary Route	False
Primary Member	False
Primary Reference	-
Primary ID	-
Checksum	2450783
Year	1991
Summit Success	False
O2 Summary	Used
Route (lowercase)	sw face

Members

Field	Value
ID	11040
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	05
Peak ID	EVER
Year	1991
Season	4
First Name	Tsuyoshi
Last Name	Akiyama
Sex	M
Age	0
Birth Date	-
Year of Birth	1970
Calculated Age	21
Citizenship	Japan
Status	Climber
Residence	Tsukiyono, Tone, Gunma, Japan
Occupation	Surveying equipment salesman
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	0
Summit Term	0
HCN	0
Checksum	2438897
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	tsuyoshi akiyama
Year of Birth	1970
Year	1991
Age at Expedition	21
Role	Member

Field	Value
ID	11041
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	06
Peak ID	EVER
Year	1991
Season	4
First Name	Shinsuki
Last Name	Ezuka
Sex	M
Age	0
Birth Date	-
Year of Birth	1961
Calculated Age	30
Citizenship	Japan
Status	Climber
Residence	Isesaki, Gunma, Japan
Occupation	Electrical engineer
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	0
Summit Term	0
HCN	0
Checksum	2435452
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	shinsuki ezuka
Year of Birth	1961
Year	1991
Age at Expedition	30
Role	Member

Field	Value
ID	11042
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	07
Peak ID	EVER
Year	1991
Season	4
First Name	Fumiaki
Last Name	Goto
Sex	M
Age	0
Birth Date	-
Year of Birth	1965
Calculated Age	26
Citizenship	Japan
Status	Climber
Residence	Sakai, Gunma, Japan
Occupation	Electrical engineer
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8350
Summit Date 1	1991-12-21
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Notes	At & above C4 sleeping & climbing
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	3
Summit Term	3
HCN	0
Checksum	2436946
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	fumiaki goto
Year of Birth	1965
Year	1991
Age at Expedition	26
Role	Member

Field	Value
ID	11043
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	08
Peak ID	EVER
Year	1991
Season	4
First Name	Yasuhiro
Last Name	Hashimoto
Sex	M
Age	0
Birth Date	-
Year of Birth	1954
Calculated Age	37
Citizenship	Japan
Status	Climber
Residence	Hakuraku, Kanagawa, Japan
Occupation	Construction company staff
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	0
Summit Term	0
HCN	0
Checksum	2433033
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	yasuhiro hashimoto
Year of Birth	1954
Year	1991
Age at Expedition	37
Role	Member

Field	Value
ID	11044
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	01
Peak ID	EVER
Year	1991
Season	4
First Name	Hikaru
Last Name	Hoshino
Sex	M
Age	0
Birth Date	-
Year of Birth	1932
Calculated Age	59
Citizenship	Japan
Status	General Leader
Residence	Numata, Gunma, Japan
Occupation	Construction company managing director
Leader	True
Deputy	False
Basecamp Only	True
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	True
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	1
Summit Term	17
HCN	0
Checksum	2425094
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	hikaru hoshino
Year of Birth	1932
Year	1991
Age at Expedition	59
Role	Leader

Field	Value
ID	11045
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	09
Peak ID	EVER
Year	1991
Season	4
First Name	Ryushi
Last Name	Hoshino
Sex	M
Age	0
Birth Date	-
Year of Birth	1967
Calculated Age	23
Citizenship	Japan
Status	Climber
Residence	Kurohone, Seta-gun, Gunma, Japan
Occupation	Advertising company staff member
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	(1967-2001) Died 14 Oct 2001 on Dhaulagiri I from presumed fall
Summit Bid	0
Summit Term	0
HCN	0
Checksum	2437875
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	ryushi hoshino
Year of Birth	1967
Year	1991
Age at Expedition	24
Role	Member

Field	Value
ID	11046
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	10
Peak ID	EVER
Year	1991
Season	4
First Name	Fumie
Last Name	Kimura
Sex	F
Age	0
Birth Date	-
Year of Birth	1955
Calculated Age	36
Citizenship	Japan
Status	Climber
Residence	Kiryu, Gunma, Japan
Occupation	Sports shop employee
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	Married name is Fumie Yoshida (2 expeditions)
Necrology	-
Summit Bid	0
Summit Term	0
HCN	0
Checksum	2433458
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	fumie kimura
Year of Birth	1955
Year	1991
Age at Expedition	36
Role	Member

Field	Value
ID	11047
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	11
Peak ID	EVER
Year	1991
Season	4
First Name	Hirofumi
Last Name	Konishi
Sex	M
Age	0
Birth Date	-
Year of Birth	1962
Calculated Age	29
Citizenship	Japan
Status	Climber
Residence	Kodaira, Tokyo, Japan
Occupation	Does odd jobs like cleaning windows & mtn equipment
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	0
Summit Term	0
HCN	0
Checksum	2435797
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	hirofumi konishi
Year of Birth	1962
Year	1991
Age at Expedition	29
Role	Member

Field	Value
ID	11048
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	12
Peak ID	EVER
Year	1991
Season	4
First Name	Noriyuki
Last Name	Matsuzaki
Sex	M
Age	0
Birth Date	-
Year of Birth	1967
Calculated Age	24
Citizenship	Japan
Status	Climber
Residence	Yabutsuka-Honmachi, Nitta, Gunma, Japan
Occupation	Engineer in printing company
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	0
Summit Term	0
HCN	0
Checksum	2437835
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	noriyuki matsuzaki
Year of Birth	1967
Year	1991
Age at Expedition	24
Role	Member

Field	Value
ID	11049
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	13
Peak ID	EVER
Year	1991
Season	4
First Name	Yutaka
Last Name	Nagakubo
Sex	M
Age	0
Birth Date	-
Year of Birth	1962
Calculated Age	29
Citizenship	Japan
Status	Climber
Residence	Tokyo, Japan
Occupation	Staff photographer of sports newspaper
Leader	False
Deputy	False
Basecamp Only	True
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	True
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	1
Summit Term	17
HCN	0
Checksum	2435761
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	yutaka nagakubo
Year of Birth	1962
Year	1991
Age at Expedition	29
Role	BC Only

Field	Value
ID	11050
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	03
Peak ID	EVER
Year	1991
Season	4
First Name	Hideji
Last Name	Nazuka
Sex	M
Age	0
Birth Date	-
Year of Birth	1954
Calculated Age	36
Citizenship	Japan
Status	Climbing Leader
Residence	Maebashi, Gunma, Japan
Occupation	Gardener
Leader	False
Deputy	True
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8350
Summit Date 1	1992-01-08
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Notes	At & above C4 sleeping & climbing
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	(1954-2004) Died 10 Oct 2004 on Annapurna I from avalanche
Summit Bid	3
Summit Term	3
HCN	0
Checksum	2433132
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	hideji nazuka
Year of Birth	1954
Year	1991
Age at Expedition	37
Role	Deputy

Field	Value
ID	11051
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	14
Peak ID	EVER
Year	1991
Season	4
First Name	Ryuzo
Last Name	Oda
Sex	M
Age	0
Birth Date	-
Year of Birth	1962
Calculated Age	29
Citizenship	Japan
Status	Climber
Residence	Chofu, Tokyo, Japan
Occupation	Window cleaner
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	0
Summit Term	0
HCN	0
Checksum	2435988
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	ryuzo oda
Year of Birth	1962
Year	1991
Age at Expedition	29
Role	Member

Field	Value
ID	11052
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	04
Peak ID	EVER
Year	1991
Season	4
First Name	Yoshio
Last Name	Ogata
Sex	M
Age	0
Birth Date	-
Year of Birth	1948
Calculated Age	43
Citizenship	Japan
Status	Deputy Leader
Residence	Kodaira, Tokyo, Japan
Occupation	Himalayan Association of Japan staff member
Leader	False
Deputy	True
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8350
Summit Date 1	1991-12-21
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Notes	At & above C4 sleeping & climbing
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	3
Summit Term	3
HCN	0
Checksum	2430807
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	yoshio ogata
Year of Birth	1948
Year	1991
Age at Expedition	43
Role	Deputy

Field	Value
ID	11053
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	15
Peak ID	EVER
Year	1991
Season	4
First Name	Mitsuyoshi
Last Name	Sato
Sex	M
Age	0
Birth Date	-
Year of Birth	1961
Calculated Age	30
Citizenship	Japan
Status	Climber
Residence	Maebashi, Gunma, Japan
Occupation	Soft drinks salesman
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8350
Summit Date 1	1992-01-08
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Notes	At & above C4 sleeping & climbing
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	3
Summit Term	3
HCN	0
Checksum	2435465
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	mitsuyoshi sato
Year of Birth	1961
Year	1991
Age at Expedition	30
Role	Member

Field	Value
ID	11054
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	16
Peak ID	EVER
Year	1991
Season	4
First Name	Osamu
Last Name	Tanabe
Sex	M
Age	0
Birth Date	-
Year of Birth	1961
Calculated Age	30
Citizenship	Japan
Status	Climber
Residence	Nagoya, Aichi, Japan
Occupation	Construction company staff
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	0
Summit Term	0
HCN	0
Checksum	2435363
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	osamu tanabe
Year of Birth	1961
Year	1991
Age at Expedition	30
Role	Member

Field	Value
ID	11055
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	02
Peak ID	EVER
Year	1991
Season	4
First Name	Kuniaki
Last Name	Yagihara
Sex	M
Age	0
Birth Date	-
Year of Birth	1946
Calculated Age	44
Citizenship	Japan
Status	Leader
Residence	Maebashi, Gunma, Japan
Occupation	Travel agency director
Leader	True
Deputy	False
Basecamp Only	True
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	True
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	1
Summit Term	17
HCN	0
Checksum	2430226
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	kuniaki yagihara
Year of Birth	1946
Year	1991
Age at Expedition	45
Role	Leader

Field	Value
ID	11056
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	17
Peak ID	EVER
Year	1991
Season	4
First Name	Hideki
Last Name	Yoshida
Sex	M
Age	0
Birth Date	-
Year of Birth	1953
Calculated Age	38
Citizenship	Japan
Status	Climber
Residence	Nagoya, Japan
Occupation	Engineer
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	0
Summit Term	0
HCN	0
Checksum	2432591
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	hideki yoshida
Year of Birth	1953
Year	1991
Age at Expedition	38
Role	Member

Field	Value
ID	11057
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER91401
Member ID	18
Peak ID	EVER
Year	1991
Season	4
First Name	Tetsuaki
Last Name	Yoshimura
Sex	M
Age	0
Birth Date	-
Year of Birth	1961
Calculated Age	30
Citizenship	Japan
Status	Climber
Residence	Hirosaki, Aomori, Japan
Occupation	Physician
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	False
Personal High Point (m)	0
Summit Date 1	-
Summit Date 2	-
Summit Date 3	-
Summit Time 1	-
Summit Time 2	-
Summit Time 3	-
Route 1	0
Route 2	0
Route 3	0
Ascent 1	0
Ascent 2	0
Ascent 3	0
O2 Used	False
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Notes	-
Death	False
Death Date	-
Death Time	-
Death Type	0
Death Height (m)	0
Death Class	0
AMS	False
Weather	False
Injury	False
Injury Date	-
Injury Time	-
Injury Type	0
Injury Height (m)	0
Death Notes	-
Member Notes	-
Necrology	-
Summit Bid	0
Summit Term	0
HCN	0
Checksum	2435571
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	tetsuaki yoshimura
Year of Birth	1961
Year	1991
Age at Expedition	30
Role	Member

18 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
Tsuyoshi Akiyama	M	1970	Japan	Climber	Tsukiyono, Tone, Gunma, Japan	Surveying equipment salesman	Details Other expeditions
Shinsuki Ezuka	M	1961	Japan	Climber	Isesaki, Gunma, Japan	Electrical engineer	Details Other expeditions
Fumiaki Goto	M	1965	Japan	Climber	Sakai, Gunma, Japan	Electrical engineer	Details Other expeditions
Yasuhiro Hashimoto	M	1954	Japan	Climber	Hakuraku, Kanagawa, Japan	Construction company staff	Details Other expeditions
Hikaru Hoshino	M	1932	Japan	General Leader	Numata, Gunma, Japan	Construction company managing director	Details Other expeditions
Ryushi Hoshino	M	1967	Japan	Climber	Kurohone, Seta-gun, Gunma, Japan	Advertising company staff member	Details Other expeditions
Fumie Kimura	F	1955	Japan	Climber	Kiryu, Gunma, Japan	Sports shop employee	Details Other expeditions
Hirofumi Konishi	M	1962	Japan	Climber	Kodaira, Tokyo, Japan	Does odd jobs like cleaning windows & mtn equipment	Details Other expeditions
Noriyuki Matsuzaki	M	1967	Japan	Climber	Yabutsuka-Honmachi, Nitta, Gunma, Japan	Engineer in printing company	Details Other expeditions
Yutaka Nagakubo	M	1962	Japan	Climber	Tokyo, Japan	Staff photographer of sports newspaper	Details Other expeditions
Hideji Nazuka	M	1954	Japan	Climbing Leader	Maebashi, Gunma, Japan	Gardener	Details Other expeditions
Ryuzo Oda	M	1962	Japan	Climber	Chofu, Tokyo, Japan	Window cleaner	Details Other expeditions
Yoshio Ogata	M	1948	Japan	Deputy Leader	Kodaira, Tokyo, Japan	Himalayan Association of Japan staff member	Details Other expeditions
Mitsuyoshi Sato	M	1961	Japan	Climber	Maebashi, Gunma, Japan	Soft drinks salesman	Details Other expeditions
Osamu Tanabe	M	1961	Japan	Climber	Nagoya, Aichi, Japan	Construction company staff	Details Other expeditions
Kuniaki Yagihara	M	1946	Japan	Leader	Maebashi, Gunma, Japan	Travel agency director	Details Other expeditions
Hideki Yoshida	M	1953	Japan	Climber	Nagoya, Japan	Engineer	Details Other expeditions
Tetsuaki Yoshimura	M	1961	Japan	Climber	Hirosaki, Aomori, Japan	Physician	Details Other expeditions

References

Field	Value
ID	2397
Imported	2026-03-06 18:06:36.307770
Expedition ID	EVER91401
Reference ID	01
Year	1991
Type	2
Journal	AAJ
Author	Hawley, Elizabeth
Title	-
Publisher	-
Publication Date	1992
Language	-
Citation	66:205-206 (1992)
Yak 94	-
Notes	-

Field	Value
ID	2529
Imported	2026-03-06 18:06:36.307770
Expedition ID	EVER91401
Reference ID	02
Year	1991
Type	2
Journal	JAC
Author	Ogata, Yoshio
Title	Japan Gunma Winter Sagarmatha South-West Face Expedition 1991-92
Publisher	-
Publication Date	1992
Language	English
Citation	87:A32-34 (1992)
Yak 94	-
Notes	Route map and photos in English included in Japanese section

Field	Value
ID	2543
Imported	2026-03-06 18:06:36.307770
Expedition ID	EVER91401
Reference ID	03
Year	1991
Type	2
Journal	HJ
Author	Ogata, Yoshio
Title	Sagarmatha Southwest Face Expedition 1991-1992
Publisher	-
Publication Date	1992
Language	-
Citation	49:179-182 (1991-1992)
Yak 94	-
Notes	-

Field	Value
ID	3521
Imported	2026-03-06 18:06:36.307770
Expedition ID	EVER91401
Reference ID	04
Year	1991
Type	1
Journal	-
Author	Gunma-ken Mountaineering Union
Title	Sagarmatha: Southwest Face in Winter
Publisher	By expedition, Maebashi, Japan
Publication Date	1995
Language	Japanese w/English summary
Citation	-
Yak 94	-
Notes	-

Field	Value
ID	4634
Imported	2026-03-06 18:06:36.307770
Expedition ID	EVER91401
Reference ID	05
Year	1991
Type	3
Journal	MM
Author	-
Title	-
Publisher	-
Publication Date	1992
Language	-
Citation	144:5 (Mar 1992)
Yak 94	-
Notes	-

Field	Value
ID	5637
Imported	2026-03-06 18:06:36.307770
Expedition ID	EVER91401
Reference ID	06
Year	1991
Type	2
Journal	IM
Author	Ogata, Yoshio
Title	Japan Gunma Winter Mt. Everest SW Face Expedition 1991-92
Publisher	-
Publication Date	1992
Language	-
Citation	28:40-42 (1992)
Yak 94	-
Notes	-

Field	Value
ID	6041
Imported	2026-03-06 18:06:36.307770
Expedition ID	EVER91401
Reference ID	07
Year	1991
Type	2
Journal	JAC
Author	Ogata, Yoshio
Title	Japan Gunma Winter Sagarmatha South-West Face Expedition 1991-92
Publisher	-
Publication Date	1992
Language	Japanese
Citation	87:98-103 (1992)
Yak 94	-
Notes	Includes route map and photos in English

Field	Value
ID	6742
Imported	2026-03-06 18:06:36.307770
Expedition ID	EVER91401
Reference ID	08
Year	1991
Type	3
Journal	IWA
Author	-
Title	-
Publisher	-
Publication Date	1992
Language	Japanese w/English summary
Citation	:215 (1992)
Yak 94	-
Notes	-

Field	Value
ID	11432
Imported	2026-03-06 18:06:36.307770
Expedition ID	EVER91401
Reference ID	09
Year	1991
Type	5
Journal	-
Author	-
Title	http://publications.americanalpineclub.org/articles/12199220505/Asia-Nepal-Everest-South-Face-Winter-Attempt-1991-2
Publisher	-
Publication Date	-
Language	-
Citation	-
Yak 94	-
Notes	-

Field	Value
ID	13464
Imported	2026-03-06 18:06:36.307770
Expedition ID	EVER91401
Reference ID	10
Year	1991
Type	5
Journal	-
Author	-
Title	https://www.himalayanclub.org/hj/49/23/sagarmatha-southwest-face-expedition-1991-1992/
Publisher	-
Publication Date	-
Language	-
Citation	-
Yak 94	-
Notes	-

10 recorded references.

Expedition ID	Journal	Author	Title	Publisher	Citation	Yak 94
EVER91401	AAJ	Hawley, Elizabeth	-	-	66:205-206 (1992)	-
EVER91401	JAC	Ogata, Yoshio	Japan Gunma Winter Sagarmatha South-West Face Expedition 1991-92	-	87:A32-34 (1992)	-
EVER91401	HJ	Ogata, Yoshio	Sagarmatha Southwest Face Expedition 1991-1992	-	49:179-182 (1991-1992)	-
EVER91401	-	Gunma-ken Mountaineering Union	Sagarmatha: Southwest Face in Winter	By expedition, Maebashi, Japan	-	-
EVER91401	MM	-	-	-	144:5 (Mar 1992)	-
EVER91401	IM	Ogata, Yoshio	Japan Gunma Winter Mt. Everest SW Face Expedition 1991-92	-	28:40-42 (1992)	-
EVER91401	JAC	Ogata, Yoshio	Japan Gunma Winter Sagarmatha South-West Face Expedition 1991-92	-	87:98-103 (1992)	-
EVER91401	IWA	-	-	-	:215 (1992)	-
EVER91401	-	-	http://publications.americanalpineclub.org/articles/12199220505/Asia-Nepal-Everest-South-Face-Winter-Attempt-1991-2	-	-	-
EVER91401	-	-	https://www.himalayanclub.org/hj/49/23/sagarmatha-southwest-face-expedition-1991-1992/	-	-	-