Numbur | 1990 SW Ridge

A Japan expedition to Numbur in 1990 via SW Ridge, led by Isao Fukushima. Summit reached on 18th October 1990. 9 members recorded.

Expedition Details

Field	Value
ID	670
Imported	2026-03-06 18:04:49.359634
Expedition ID	NUMB90301
Peak ID	NUMB
Year	1990
Season	3
Host Country	1
Route 1	SW Ridge
Route 2	-
Route 3	-
Route 4	-
Nationality	Japan
Leaders	Isao Fukushima
Sponsor	Okutama Sangaku-kai Nepal Himal Expedition 1990 to Numbur
Success 1	True
Success 2	False
Success 3	False
Success 4	False
Ascent 1	8th,9th
Ascent 2	-
Ascent 3	-
Ascent 4	-
Claimed	False
Disputed	False
Countries	-
Approach	-
Basecamp Date	1990-09-29
Summit Date	1990-10-18
Summit Time	1045
Summit Days	19
Total Days	0
Termination Date	-
Termination Reason	1
Termination Notes	-
High Point (m)	6958
Traverse	False
Ski	False
Paraglide	False
Camps	3
Fixed Rope (m)	2500
Total Members	7
Summit Members	4
Member Deaths	0
Total Hired	3
Summit Hired	2
Hired Deaths	0
No Hired	False
O2 Used	False
O2 None	True
O2 Climb	False
O2 Descent	False
O2 Sleep	False
O2 Medical	False
O2 Taken	False
O2 Unknown	False
Other Summits	-
Campsites	BC(29/09,4600m),C1(04/10,5300m),C2(09/10,5800m),C3(12/10,6300m),Smt(18-19/10)
Route Notes	BC at west side of Dudh Kund Glacier near lake at Yuligolcia C1 at northwest end of glacier C2 on SW Ridge C3 on SW Ridge. 13 Oct to BC for rest. 15 Oct up again by Masuda, Saitoh, Pasang Sherpa and Gyalzen Sherpa to C1, 16 Oct to C2, 17th to C3 and 18 Oct to summit at 10:45 am (left C3 6:00 am) and returned to C2 while Chiba and Minegishi to C3 for their own summit success on 19th (left C3 also at 6:00 am and on top 9:15 am) and down to C1 same day. Route not difficult technically but fixed 2500m rope for safety and speed. Sugimo left early to return to work.
Accidents	None
Achievement	-
Agency	Cosmo Treks
Commercial Route	-
Standard Route	-
Primary Route	False
Primary Member	False
Primary Reference	-
Primary ID	-
Checksum	2451478
Year	1990
Summit Success	True
O2 Summary	None
Route (lowercase)	sw ridge

Members

Field	Value
ID	19563
Imported	2026-03-06 18:06:05.675609
Expedition ID	NUMB90301
Member ID	03
Peak ID	NUMB
Year	1990
Season	3
First Name	Shinji
Last Name	Chiba
Sex	M
Age	0
Birth Date	-
Year of Birth	1966
Calculated Age	24
Citizenship	Japan
Status	Climber
Residence	Adati, Tokyo, Japan
Occupation	Office worker
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)	6958
Summit Date 1	1990-10-19
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0915
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	9
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	5
Summit Term	1
HCN	0
Checksum	2437203
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	shinji chiba
Year of Birth	1966
Year	1990
Age at Expedition	24
Role	Member

Field	Value
ID	19564
Imported	2026-03-06 18:06:05.675609
Expedition ID	NUMB90301
Member ID	01
Peak ID	NUMB
Year	1990
Season	3
First Name	Isao
Last Name	Fukushima
Sex	M
Age	0
Birth Date	-
Year of Birth	1950
Calculated Age	39
Citizenship	Japan
Status	Leader
Residence	Konganei, Tokyo, Japan
Occupation	Editor of books
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)	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	0
Summit Term	0
HCN	0
Checksum	2431653
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	isao fukushima
Year of Birth	1950
Year	1990
Age at Expedition	40
Role	Leader

Field	Value
ID	19565
Imported	2026-03-06 18:06:05.675609
Expedition ID	NUMB90301
Member ID	04
Peak ID	NUMB
Year	1990
Season	3
First Name	Takashi
Last Name	Masuda
Sex	M
Age	0
Birth Date	-
Year of Birth	1960
Calculated Age	30
Citizenship	Japan
Status	Climber
Residence	Kokubunji, Tokyo, 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	True
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	-
High Point (m)	True
Personal High Point (m)	6958
Summit Date 1	1990-10-18
Summit Date 2	-
Summit Date 3	-
Summit Time 1	1045
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	8
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	5
Summit Term	1
HCN	0
Checksum	2435225
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	takashi masuda
Year of Birth	1960
Year	1990
Age at Expedition	30
Role	Member

Field	Value
ID	19566
Imported	2026-03-06 18:06:05.675609
Expedition ID	NUMB90301
Member ID	02
Peak ID	NUMB
Year	1990
Season	3
First Name	Hajime
Last Name	Minegishi
Sex	M
Age	0
Birth Date	-
Year of Birth	1957
Calculated Age	33
Citizenship	Japan
Status	Deputy Leader
Residence	Kuntachi, Tokyo, Japan
Occupation	Architect
Leader	False
Deputy	True
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)	6958
Summit Date 1	1990-10-19
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0915
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	9
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	5
Summit Term	1
HCN	0
Checksum	2434051
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	hajime minegishi
Year of Birth	1957
Year	1990
Age at Expedition	33
Role	Deputy

Field	Value
ID	19567
Imported	2026-03-06 18:06:05.675609
Expedition ID	NUMB90301
Member ID	05
Peak ID	NUMB
Year	1990
Season	3
First Name	Tokao
Last Name	Ono
Sex	M
Age	0
Birth Date	-
Year of Birth	1961
Calculated Age	29
Citizenship	Japan
Status	Climber
Residence	Koganei, Tokyo, Japan
Occupation	Office worker
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	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	0
Summit Term	0
HCN	0
Checksum	2435418
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	tokao ono
Year of Birth	1961
Year	1990
Age at Expedition	29
Role	Member

Field	Value
ID	19568
Imported	2026-03-06 18:06:05.675609
Expedition ID	NUMB90301
Member ID	06
Peak ID	NUMB
Year	1990
Season	3
First Name	Hiroto
Last Name	Saitoh
Sex	M
Age	0
Birth Date	-
Year of Birth	1963
Calculated Age	27
Citizenship	Japan
Status	Climber
Residence	Kokubunji, Tokyo, Japan
Occupation	President, trucking company
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)	6958
Summit Date 1	1990-10-18
Summit Date 2	-
Summit Date 3	-
Summit Time 1	1045
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	8
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	5
Summit Term	1
HCN	0
Checksum	2436340
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	hiroto saitoh
Year of Birth	1963
Year	1990
Age at Expedition	27
Role	Member

Field	Value
ID	19569
Imported	2026-03-06 18:06:05.675609
Expedition ID	NUMB90301
Member ID	07
Peak ID	NUMB
Year	1990
Season	3
First Name	Tomohide
Last Name	Sugimo
Sex	M
Age	0
Birth Date	-
Year of Birth	1965
Calculated Age	25
Citizenship	Japan
Status	Climber
Residence	Okayama-shi, Okayama, Japan
Occupation	Official in Ministry of Agriculture
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	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	18
HCN	0
Checksum	2437011
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	tomohide sugimo
Year of Birth	1965
Year	1990
Age at Expedition	25
Role	Member

Field	Value
ID	19570
Imported	2026-03-06 18:06:05.675609
Expedition ID	NUMB90301
Member ID	09
Peak ID	NUMB
Year	1990
Season	3
First Name	Pasang
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	-
Calculated Age	27
Citizenship	Nepal
Status	H-A Worker
Residence	-
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)	6958
Summit Date 1	1990-10-18
Summit Date 2	-
Summit Date 3	-
Summit Time 1	1045
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	8
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	5
Summit Term	1
HCN	0
Checksum	-6
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	pasang sherpa
Year of Birth	-
Year	1990
Age at Expedition	-
Role	Hired

Field	Value
ID	19571
Imported	2026-03-06 18:06:05.675609
Expedition ID	NUMB90301
Member ID	08
Peak ID	NUMB
Year	1990
Season	3
First Name	Gyalzen
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1961
Calculated Age	29
Citizenship	Nepal
Status	H-A Worker
Residence	Yilajung, 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)	6958
Summit Date 1	1990-10-18
Summit Date 2	-
Summit Date 3	-
Summit Time 1	1045
Summit Time 2	-
Summit Time 3	-
Route 1	1
Route 2	0
Route 3	0
Ascent 1	8
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	5
Summit Term	1
HCN	0
Checksum	2435445
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	gyalzen sherpa
Year of Birth	1961
Year	1990
Age at Expedition	29
Role	Hired

9 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
Shinji Chiba	M	1966	Japan	Climber	Adati, Tokyo, Japan	Office worker	Details Other expeditions
Isao Fukushima	M	1950	Japan	Leader	Konganei, Tokyo, Japan	Editor of books	Details Other expeditions
Takashi Masuda	M	1960	Japan	Climber	Kokubunji, Tokyo, Japan	Engineer	Details Other expeditions
Hajime Minegishi	M	1957	Japan	Deputy Leader	Kuntachi, Tokyo, Japan	Architect	Details Other expeditions
Tokao Ono	M	1961	Japan	Climber	Koganei, Tokyo, Japan	Office worker	Details Other expeditions
Hiroto Saitoh	M	1963	Japan	Climber	Kokubunji, Tokyo, Japan	President, trucking company	Details Other expeditions
Tomohide Sugimo	M	1965	Japan	Climber	Okayama-shi, Okayama, Japan	Official in Ministry of Agriculture	Details Other expeditions
Pasang Sherpa	M	-	Nepal	H-A Worker	-	-	Details Other expeditions
Gyalzen Sherpa	M	1961	Nepal	H-A Worker	Yilajung, Khumbu	-	Details Other expeditions

References

Field	Value
ID	782
Imported	2026-03-06 18:06:36.307770
Expedition ID	NUMB90301
Reference ID	01
Year	1990
Type	2
Journal	AAJ
Author	Hawley, Elizabeth
Title	-
Publisher	-
Publication Date	1991
Language	-
Citation	65:234 (1991)
Yak 94	-
Notes	-

Field	Value
ID	4580
Imported	2026-03-06 18:06:36.307770
Expedition ID	NUMB90301
Reference ID	02
Year	1990
Type	3
Journal	MM
Author	-
Title	-
Publisher	-
Publication Date	1991
Language	-
Citation	137:9 (Jan 1991)
Yak 94	-
Notes	-

Field	Value
ID	6735
Imported	2026-03-06 18:06:36.307770
Expedition ID	NUMB90301
Reference ID	03
Year	1990
Type	3
Journal	IWA
Author	-
Title	-
Publisher	-
Publication Date	1991
Language	Japanese w/English summary
Citation	:215 (1991)
Yak 94	-
Notes	-

Field	Value
ID	6850
Imported	2026-03-06 18:06:36.307770
Expedition ID	NUMB90301
Reference ID	04
Year	1990
Type	2
Journal	IWA
Author	-
Title	-
Publisher	-
Publication Date	1991
Language	Japanese
Citation	:54 (1991)
Yak 94	-
Notes	-

Field	Value
ID	11600
Imported	2026-03-06 18:06:36.307770
Expedition ID	NUMB90301
Reference ID	05
Year	1990
Type	5
Journal	-
Author	-
Title	http://publications.americanalpineclub.org/articles/12199123402/Asia-Nepal-Numbur
Publisher	-
Publication Date	-
Language	-
Citation	-
Yak 94	-
Notes	-

5 recorded references.

Expedition ID	Journal	Author	Title	Publisher	Citation	Yak 94
NUMB90301	AAJ	Hawley, Elizabeth	-	-	65:234 (1991)	-
NUMB90301	MM	-	-	-	137:9 (Jan 1991)	-
NUMB90301	IWA	-	-	-	:215 (1991)	-
NUMB90301	IWA	-	-	-	:54 (1991)	-
NUMB90301	-	-	http://publications.americanalpineclub.org/articles/12199123402/Asia-Nepal-Numbur	-	-	-