Everest | 2011 S Col-SE Ridge

A Japan expedition to Everest in 2011 via S Col-SE Ridge, led by Naoko Watanabe. Summit reached on 12th May 2011. 2 members recorded.

Expedition Details

Field	Value
ID	7079
Imported	2026-03-06 18:04:49.359634
Expedition ID	EVER11120
Peak ID	EVER
Year	2011
Season	1
Host Country	1
Route 1	S Col-SE Ridge
Route 2	-
Route 3	-
Route 4	-
Nationality	Japan
Leaders	Naoko Watanabe
Sponsor	Japanese on Everest
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	Lukla->Namche->Debuche->Pheriche->Lobuche
Basecamp Date	2011-04-13
Summit Date	2011-05-12
Summit Time	-
Summit Days	29
Total Days	33
Termination Date	2011-05-16
Termination Reason	4
Termination Notes	Abandoned at 8700m due to strong wind, white-out
High Point (m)	8700
Traverse	False
Ski	False
Paraglide	False
Camps	4
Fixed Rope (m)	0
Total Members	1
Summit Members	0
Member Deaths	0
Total Hired	1
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	-
Campsites	BC(13/04,5085m),C1(28/05,6000m),C2(29/04,6300m),C3(09/05,7300m),C4(12/05,8000m),xxx(12/05,8700m)
Route Notes	Watanabe and Ritemba started their summit push at 9 pm on 11 May from C4. When they reached 8700m at 7 am on 12 May strong wind started picking up and visibility became very poor due to white-out. Many climbers behind them turned around. Watanabe and Ritemba decided to stop and they too turned around [and back] to C4 at 4 pm. Watanabe was suffering from throat infection, and also had vomited several times. The team did not put their own tent at C4. Their plan was to go down to C3 after summit. So they had to spent the night in the tent of Ritemba's brother without sleeping bag. Watanabe said that it was very cold night and oxygen which she was using also ran out. Next day on 13 May Watanabe and Ritemba went down to C2 and the following day to BC. Watanabe's condition was very bad so she was air-lifted to Kathmandu by helicopter; on 16 May she was hospitalized for few days. Sherpa: Ritemba Sherpa, 08/05/1970, Yaphu-9, Makalu, Everest X2
Accidents	-
Achievement	-
Agency	Taro Treks (Prestige Adventure pmt)
Commercial Route	True
Standard Route	True
Primary Route	False
Primary Member	False
Primary Reference	False
Primary ID	-
Checksum	2462025
Year	2011
Summit Success	False
O2 Summary	Used
Route (lowercase)	s col-se ridge

Members

Field	Value
ID	52661
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER11120
Member ID	01
Peak ID	EVER
Year	2011
Season	1
First Name	Naoko
Last Name	Watanabe
Sex	F
Age	0
Birth Date	-
Year of Birth	1981
Calculated Age	29
Citizenship	Japan
Status	Leader
Residence	Honjo-shi, Fukuoka, Japan
Occupation	Nurse
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	False
High Point (m)	True
Personal High Point (m)	8700
Summit Date 1	2011-05-12
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	From C3 to 8700m to 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	4
Summit Term	3
HCN	0
Checksum	2442960
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	naoko watanabe
Year of Birth	1981
Year	2011
Age at Expedition	30
Role	Leader

Field	Value
ID	52662
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER11120
Member ID	02
Peak ID	EVER
Year	2011
Season	1
First Name	Ritemba
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1970
Calculated Age	40
Citizenship	Nepal
Status	H-A Worker
Residence	Yaphu-9, Makalu-Barun
Occupation	-
Leader	False
Deputy	False
Basecamp Only	False
Not to BC	False
Support	False
Disabled	False
Hired	True
Sherpa	True
Tibetan	False
Summit Success	False
Claimed	False
Disputed	False
Solo	False
Traverse	False
Ski	False
Paraglide	False
Speed	False
High Point (m)	True
Personal High Point (m)	8700
Summit Date 1	2011-05-12
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	False
O2 Medical	False
O2 Notes	From C4 to 8700m to C4
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	4
Summit Term	3
HCN	0
Checksum	2438781
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	ritemba sherpa
Year of Birth	1970
Year	2011
Age at Expedition	41
Role	Hired

2 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
Naoko Watanabe	F	1981	Japan	Leader	Honjo-shi, Fukuoka, Japan	Nurse	Details Other expeditions
Ritemba Sherpa	M	1970	Nepal	H-A Worker	Yaphu-9, Makalu-Barun	-	Details Other expeditions

References

0 recorded references.