Annapurna IV | 1983 NW Ridge

A Japan expedition to Annapurna IV in 1983 via NW Ridge, led by Yasumitsu Yamano. Summit reached on 9th May 1983. 5 members recorded.

Expedition Details

Field Value
ID 39
Imported 2026-03-06 18:04:49.359634
Expedition ID ANN483101
Peak ID ANN4
Year 1983
Season 1
Host Country 1
Route 1 NW Ridge
Route 2 -
Route 3 -
Route 4 -
Nationality Japan
Leaders Yasumitsu Yamano
Sponsor Timangchaur Alpine Club Expedition
Success 1 True
Success 2 False
Success 3 False
Success 4 False
Ascent 1 17th
Ascent 2 -
Ascent 3 -
Ascent 4 -
Claimed False
Disputed False
Countries -
Approach Marshyangdi->Pisang->Salatang Khola
Basecamp Date 1983-04-02
Summit Date 1983-05-09
Summit Time 0900
Summit Days 37
Total Days 0
Termination Date -
Termination Reason 1
Termination Notes -
High Point (m) 7525
Traverse False
Ski False
Paraglide False
Camps 4
Fixed Rope (m) 0
Total Members 4
Summit Members 2
Member Deaths 0
Total Hired 1
Summit Hired 1
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(02/04,3500m),C1(08/04,4300m),C2(21/04,5250m),C3(29/04,6100m),C4(08/05,7000m),Smt(09/05)
Route Notes Left C4 6:00 am and reached top 9:00 am. 2 weeks between C1 and C2 because one week bad weather. Much snowfall - used 2500m fixed rope up steep face to the snow ridge. The 4-man Timangchaur Yamanokai Club party of Tokyo led by Yasumitsu Yamano (36) climbed the mountain by north on May 9. BC(3500m) was made by Salatang Khola on April 2. C1(4300m) on 8th; C2(5300m) on 21st and C3(6100m) on 29th were made. Next day, deputy leader Osamu Yamamoto (31) got fever and members evacuated him down to a village. Noboru Yokoyama (28) and Mikioh Takamatsu (34) with Sherpa members only, resumed climbing and fixed ropes for 500m on North Ridge on 8th and made C4 (7000m). The two members and sirdar Ang Phuri Lama reached the top. Yamamoto was later diagnosed hepatitis in a KTM hospital.
Accidents Yamamoto evacuated by helicopter with hepatitis (nothing else)
Achievement -
Agency -
Commercial Route -
Standard Route -
Primary Route False
Primary Member False
Primary Reference -
Primary ID -
Checksum 2450552
Year 1983
Summit Success True
O2 Summary None
Route (lowercase) nw ridge

Members

5 recorded members.

Name Sex Year of Birth Citizenship Status Residence Occupation
Yasumitsu Yamano M 1946 Japan Leader Sayama, Saitama, Japan Official of Tokyo metropolitian govt Details Other expeditions
Osamu Yamamoto M 1961 Japan Climber Kawasaki, Kanagawa, Japan - Details Other expeditions
Noboru Yokoyama M 1954 Japan Climber Tokyo, Japan Official of Setagaya, a part of Tokyo Details Other expeditions
Mikio Takamatsu M 1949 Japan Climber Chigasaki, Kanagawa, Japan Communications engineer Details Other expeditions
Ang Phuri Lama M 1948 Nepal Sirdar Beni-3, Solukhumbu - Details Other expeditions

References

5 recorded references.

Expedition ID Journal Author Title Publisher Citation Yak 94
ANN483101 AAJ Yamano, Yasumitsu - - 58:253-254 (1984) -
ANN483101 MM - - - 92:9 (Jul 1983) -
ANN483101 IWA - - - 105:201 (1984) -
ANN483101 IWA - - - 105:44 (1984) -
ANN483101 - - http://publications.americanalpineclub.org/articles/12198425304/Memphis-Mountaineers-Inc - - -