Cho Oyu | 1990 W Ridge-W Face from N

A Japan expedition to Cho Oyu in 1990 via W Ridge-W Face from N, led by Takao Haga. Summit reached on 27th April 1990. 15 members recorded.

Expedition Details

Field	Value
ID	1061
Imported	2026-03-06 18:04:49.359634
Expedition ID	CHOY90101
Peak ID	CHOY
Year	1990
Season	1
Host Country	2
Route 1	W Ridge-W Face from N
Route 2	-
Route 3	-
Route 4	-
Nationality	Japan
Leaders	Takao Haga
Sponsor	Gakushuin University Alpine Club Expedition
Success 1	True
Success 2	False
Success 3	False
Success 4	False
Ascent 1	67th
Ascent 2	-
Ascent 3	-
Ascent 4	-
Claimed	False
Disputed	False
Countries	-
Approach	-
Basecamp Date	1990-03-20
Summit Date	1990-04-27
Summit Time	-
Summit Days	38
Total Days	0
Termination Date	-
Termination Reason	1
Termination Notes	-
High Point (m)	8188
Traverse	False
Ski	False
Paraglide	False
Camps	3
Fixed Rope (m)	0
Total Members	13
Summit Members	2
Member Deaths	0
Total Hired	3
Summit Hired	2
Hired Deaths	0
No Hired	False
O2 Used	True
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Taken	False
O2 Unknown	False
Other Summits	-
Campsites	BC(20/03,5700m),C1(05/04,6200m),C2(18/04,7150m),C3(20/04,7400m),Smt(27/04)
Route Notes	Big problem about gear to BC with yaks refusing to go so far. Only one summit party succeeded. Second party on 1st May reached 7800m and then turned back by snowstorm and feared avalanching. No more attempts after that.
Accidents	Only altitude problems for 5-6 members who used Gamov bag and stayed at BC
Achievement	-
Agency	Cosmo Treks
Commercial Route	True
Standard Route	True
Primary Route	False
Primary Member	False
Primary Reference	-
Primary ID	-
Checksum	2453689
Year	1990
Summit Success	True
O2 Summary	Used
Route (lowercase)	w ridge-w face from n

Members

Field	Value
ID	4569
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	01
Peak ID	CHOY
Year	1990
Season	1
First Name	Takao
Last Name	Haga
Sex	M
Age	0
Birth Date	-
Year of Birth	-
Calculated Age	55
Citizenship	Japan
Status	Leader
Residence	-
Occupation	-
Leader	True
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)	7400
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	True
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Notes	In C3
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	27
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	takao haga
Year of Birth	-
Year	1990
Age at Expedition	-
Role	Leader

Field	Value
ID	4570
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	02
Peak ID	CHOY
Year	1990
Season	1
First Name	Hideki
Last Name	Nagata
Sex	M
Age	0
Birth Date	-
Year of Birth	-
Calculated Age	37
Citizenship	Japan
Status	Climbing Leader
Residence	-
Occupation	-
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)	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	27
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	hideki nagata
Year of Birth	-
Year	1990
Age at Expedition	-
Role	Deputy

Field	Value
ID	4571
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	07
Peak ID	CHOY
Year	1990
Season	1
First Name	Hiroshi
Last Name	Kato
Sex	M
Age	0
Birth Date	-
Year of Birth	1957
Calculated Age	32
Citizenship	Japan
Status	Climber
Residence	-
Occupation	-
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	1990-04-27
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	67
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Notes	In C3 sleeping only
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	5
Summit Term	1
HCN	0
Checksum	2434124
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	hiroshi kato
Year of Birth	1957
Year	1990
Age at Expedition	33
Role	Member

Field	Value
ID	4572
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	13
Peak ID	CHOY
Year	1990
Season	1
First Name	Yasushi
Last Name	Tanahashi
Sex	M
Age	0
Birth Date	-
Year of Birth	1963
Calculated Age	27
Citizenship	Japan
Status	Climber
Residence	Tokyo, Japan
Occupation	-
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	False
Sherpa	False
Tibetan	False
Summit Success	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	1990-04-27
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	67
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Notes	In C3 sleeping only
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	5
Summit Term	1
HCN	0
Checksum	2436091
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	yasushi tanahashi
Year of Birth	1963
Year	1990
Age at Expedition	27
Role	Member

Field	Value
ID	4573
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	14
Peak ID	CHOY
Year	1990
Season	1
First Name	Mingma Tenzing
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	-
Calculated Age	39
Citizenship	Nepal
Status	H-A Worker
Residence	Thami, Khumbu
Occupation	-
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	True
Sherpa	True
Tibetan	False
Summit Success	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	1990-04-27
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	67
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Notes	In C3 sleeping only
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	2nd ascent of Cho Oyu
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	-2
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	mingma tenzing sherpa
Year of Birth	-
Year	1990
Age at Expedition	-
Role	Hired

Field	Value
ID	4574
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	15
Peak ID	CHOY
Year	1990
Season	1
First Name	Pemba Tenji (Pekka Tenja)
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1963
Calculated Age	27
Citizenship	Nepal
Status	H-A Worker
Residence	Chattu, Solukhumbu
Occupation	-
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	True
Sherpa	True
Tibetan	False
Summit Success	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	8188
Summit Date 1	1990-04-27
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	67
Ascent 2	0
Ascent 3	0
O2 Used	True
O2 None	False
O2 Climb	False
O2 Descent	False
O2 Sleep	True
O2 Medical	False
O2 Notes	In C3 sleeping only
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	1st 8000er
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2436089
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	pemba tenji (pekka tenja) sherpa
Year of Birth	1963
Year	1990
Age at Expedition	27
Role	Hired

Field	Value
ID	30432
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	08
Peak ID	CHOY
Year	1990
Season	1
First Name	Toshio
Last Name	Kubota
Sex	M
Age	0
Birth Date	-
Year of Birth	1957
Calculated Age	32
Citizenship	Japan
Status	Climber
Residence	Aizu-Wakamatsu, Fukushima, Japan
Occupation	-
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	2434260
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	toshio kubota
Year of Birth	1957
Year	1990
Age at Expedition	33
Role	Member

Field	Value
ID	30433
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	06
Peak ID	CHOY
Year	1990
Season	1
First Name	Youtaro
Last Name	Hirao
Sex	M
Age	0
Birth Date	-
Year of Birth	-
Calculated Age	34
Citizenship	Japan
Status	Climber
Residence	Japan
Occupation	-
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	27
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	youtaro hirao
Year of Birth	-
Year	1990
Age at Expedition	-
Role	Member

Field	Value
ID	31173
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	03
Peak ID	CHOY
Year	1990
Season	1
First Name	Ichiro
Last Name	Arakawa
Sex	M
Age	0
Birth Date	-
Year of Birth	-
Calculated Age	37
Citizenship	Japan
Status	Climber
Residence	Japan
Occupation	-
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	27
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	ichiro arakawa
Year of Birth	-
Year	1990
Age at Expedition	-
Role	Member

Field	Value
ID	31174
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	09
Peak ID	CHOY
Year	1990
Season	1
First Name	Osamu
Last Name	Obata
Sex	M
Age	0
Birth Date	-
Year of Birth	-
Calculated Age	27
Citizenship	Japan
Status	Climber
Residence	Japan
Occupation	-
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	27
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	osamu obata
Year of Birth	-
Year	1990
Age at Expedition	-
Role	Member

Field	Value
ID	31175
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	12
Peak ID	CHOY
Year	1990
Season	1
First Name	Sachi
Last Name	Takano
Sex	M
Age	0
Birth Date	-
Year of Birth	1964
Calculated Age	25
Citizenship	Japan
Status	Climber
Residence	Tokyo, Japan
Occupation	-
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	2436561
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	sachi takano
Year of Birth	1964
Year	1990
Age at Expedition	26
Role	Member

Field	Value
ID	31176
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	05
Peak ID	CHOY
Year	1990
Season	1
First Name	Masayuki
Last Name	Harada
Sex	M
Age	0
Birth Date	-
Year of Birth	1968
Calculated Age	21
Citizenship	Japan
Status	Climber
Residence	Tokyo, Japan
Occupation	-
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	2438098
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	masayuki harada
Year of Birth	1968
Year	1990
Age at Expedition	22
Role	Member

Field	Value
ID	31177
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	10
Peak ID	CHOY
Year	1990
Season	1
First Name	Hisashi
Last Name	Ohmae
Sex	M
Age	0
Birth Date	-
Year of Birth	-
Calculated Age	21
Citizenship	Japan
Status	Climber
Residence	Japan
Occupation	-
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	27
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	hisashi ohmae
Year of Birth	-
Year	1990
Age at Expedition	-
Role	Member

Field	Value
ID	31178
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	04
Peak ID	CHOY
Year	1990
Season	1
First Name	Takashi
Last Name	Doi
Sex	M
Age	0
Birth Date	-
Year of Birth	-
Calculated Age	28
Citizenship	Japan
Status	Climber
Residence	Japan
Occupation	-
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	27
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	takashi doi
Year of Birth	-
Year	1990
Age at Expedition	-
Role	Member

Field	Value
ID	31179
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY90101
Member ID	11
Peak ID	CHOY
Year	1990
Season	1
First Name	Shoji
Last Name	Suganuma
Sex	M
Age	0
Birth Date	-
Year of Birth	-
Calculated Age	25
Citizenship	Japan
Status	Climber
Residence	Japan
Occupation	-
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	27
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	shoji suganuma
Year of Birth	-
Year	1990
Age at Expedition	-
Role	Member

15 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
Takao Haga	M	-	Japan	Leader	-	-	Details Other expeditions
Hideki Nagata	M	-	Japan	Climbing Leader	-	-	Details Other expeditions
Hiroshi Kato	M	1957	Japan	Climber	-	-	Details Other expeditions
Yasushi Tanahashi	M	1963	Japan	Climber	Tokyo, Japan	-	Details Other expeditions
Mingma Tenzing Sherpa	M	-	Nepal	H-A Worker	Thami, Khumbu	-	Details Other expeditions
Pemba Tenji (Pekka Tenja) Sherpa	M	1963	Nepal	H-A Worker	Chattu, Solukhumbu	-	Details Other expeditions
Toshio Kubota	M	1957	Japan	Climber	Aizu-Wakamatsu, Fukushima, Japan	-	Details Other expeditions
Youtaro Hirao	M	-	Japan	Climber	Japan	-	Details Other expeditions
Ichiro Arakawa	M	-	Japan	Climber	Japan	-	Details Other expeditions
Osamu Obata	M	-	Japan	Climber	Japan	-	Details Other expeditions
Sachi Takano	M	1964	Japan	Climber	Tokyo, Japan	-	Details Other expeditions
Masayuki Harada	M	1968	Japan	Climber	Tokyo, Japan	-	Details Other expeditions
Hisashi Ohmae	M	-	Japan	Climber	Japan	-	Details Other expeditions
Takashi Doi	M	-	Japan	Climber	Japan	-	Details Other expeditions
Shoji Suganuma	M	-	Japan	Climber	Japan	-	Details Other expeditions

References

Field	Value
ID	699
Imported	2026-03-06 18:06:36.307770
Expedition ID	CHOY90101
Reference ID	01
Year	1990
Type	2
Journal	AAJ
Author	Hawley, Elizabeth
Title	-
Publisher	-
Publication Date	1991
Language	-
Citation	65:291 (1991)
Yak 94	-
Notes	-

Field	Value
ID	2527
Imported	2026-03-06 18:06:36.307770
Expedition ID	CHOY90101
Reference ID	02
Year	1990
Type	2
Journal	JAC
Author	Haga, Taka
Title	The 1990 Expedition of Cho Oyu
Publisher	-
Publication Date	1991
Language	Japanese
Citation	86:87-90 (1991)
Yak 94	-
Notes	-

Field	Value
ID	6726
Imported	2026-03-06 18:06:36.307770
Expedition ID	CHOY90101
Reference ID	03
Year	1990
Type	3
Journal	IWA
Author	-
Title	-
Publisher	-
Publication Date	1991
Language	Japanese w/English summary
Citation	:214 (1991)
Yak 94	-
Notes	-

Field	Value
ID	6842
Imported	2026-03-06 18:06:36.307770
Expedition ID	CHOY90101
Reference ID	04
Year	1990
Type	3
Journal	IWA
Author	-
Title	-
Publisher	-
Publication Date	1991
Language	Japanese
Citation	:31 (1991)
Yak 94	-
Notes	-

Field	Value
ID	11541
Imported	2026-03-06 18:06:36.307770
Expedition ID	CHOY90101
Reference ID	05
Year	1990
Type	5
Journal	-
Author	-
Title	http://publications.americanalpineclub.org/articles/12199129101/Asia-Tibet-Cho-Oyu
Publisher	-
Publication Date	-
Language	-
Citation	-
Yak 94	-
Notes	-

5 recorded references.

Expedition ID	Journal	Author	Title	Publisher	Citation	Yak 94
CHOY90101	AAJ	Hawley, Elizabeth	-	-	65:291 (1991)	-
CHOY90101	JAC	Haga, Taka	The 1990 Expedition of Cho Oyu	-	86:87-90 (1991)	-
CHOY90101	IWA	-	-	-	:214 (1991)	-
CHOY90101	IWA	-	-	-	:31 (1991)	-
CHOY90101	-	-	http://publications.americanalpineclub.org/articles/12199129101/Asia-Tibet-Cho-Oyu	-	-	-