Cho Oyu | 2003 NW side

A Japan expedition to Cho Oyu in 2003 via NW side, led by Chizuko Kono. Summit reached on 16th September 2003. 3 members recorded.

Expedition Details

Field	Value
ID	4471
Imported	2026-03-06 18:04:49.359634
Expedition ID	CHOY03327
Peak ID	CHOY
Year	2003
Season	3
Host Country	2
Route 1	NW side
Route 2	-
Route 3	-
Route 4	-
Nationality	Japan
Leaders	Chizuko Kono
Sponsor	Independent climber
Success 1	True
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	2003-08-23
Summit Date	2003-09-16
Summit Time	1600
Summit Days	24
Total Days	28
Termination Date	2003-09-20
Termination Reason	1
Termination Notes	-
High Point (m)	8188
Traverse	False
Ski	False
Paraglide	False
Camps	3
Fixed Rope (m)	400
Total Members	1
Summit Members	1
Member Deaths	0
Total Hired	2
Summit Hired	2
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(27/08),ABC(27/08,5700m),C1(03/09,6350m),C2(14/09,7015m),C3(15/09,7375m),Smt(16/09)
Route Notes	From top saw Everest and Makalu; on top 4:00 pm; leave C3 5:30 am and returned to C3 9:00 pm to sleep. Kono used oxygen sleeping in C2 to top to C3 climbing and sleeping. 17th slept in C1. Returned to KTM 22 Sept. Summiters Sherpas: Pema Tenji, Cho Oyu X3, Everest X1 Da Chhemba, Everest 22/5/03 Tenji used oxygen to 8000m from C3, other Sherpa none, says Korean summiter Ryoo, who summited at same time as Kono's team (Ryoo spoke on 28 Sept).
Accidents	-
Achievement	-
Agency	Sherpa Summit Treks
Commercial Route	True
Standard Route	True
Primary Route	False
Primary Member	False
Primary Reference	False
Primary ID	-
Checksum	2458277
Year	2003
Summit Success	True
O2 Summary	Used
Route (lowercase)	nw side

Members

Field	Value
ID	34696
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY03327
Member ID	01
Peak ID	CHOY
Year	2003
Season	3
First Name	Chizuko
Last Name	Kono
Sex	F
Age	0
Birth Date	-
Year of Birth	1946
Calculated Age	56
Citizenship	Japan
Status	Leader
Residence	Tokyo, Japan
Occupation	Housewife
Leader	True
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	2003-09-16
Summit Date 2	-
Summit Date 3	-
Summit Time 1	1600
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	Sleeping in C2 to top to C3 climbing and sleeping
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	(1946-2013) Died 24 May 2013 on Dhaulagiri from exhaustion
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2430089
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	chizuko kono
Year of Birth	1946
Year	2003
Age at Expedition	57
Role	Leader

Field	Value
ID	34697
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY03327
Member ID	03
Peak ID	CHOY
Year	2003
Season	3
First Name	Pem Tenji (Pemba Tenzi)
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1963
Calculated Age	39
Citizenship	Nepal
Status	H-A Worker
Residence	Sotang, 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	2003-09-16
Summit Date 2	-
Summit Date 3	-
Summit Time 1	1600
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	Climbing from C3 to 8000m
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	4th ascent of Cho Oyu
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2436268
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	pem tenji (pemba tenzi) sherpa
Year of Birth	1963
Year	2003
Age at Expedition	40
Role	Hired

Field	Value
ID	34698
Imported	2026-03-06 18:06:05.675609
Expedition ID	CHOY03327
Member ID	02
Peak ID	CHOY
Year	2003
Season	3
First Name	Da Chhemba (Dachhamba)
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1968
Calculated Age	35
Citizenship	Nepal
Status	H-A Worker
Residence	Gudel-5, 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	2003-09-16
Summit Date 2	-
Summit Date 3	-
Summit Time 1	1600
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	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	Ev X 3 22/5/03
Member Notes	-
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2437873
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	da chhemba (dachhamba) sherpa
Year of Birth	1968
Year	2003
Age at Expedition	35
Role	Hired

3 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
Chizuko Kono	F	1946	Japan	Leader	Tokyo, Japan	Housewife	Details Other expeditions
Pem Tenji (Pemba Tenzi) Sherpa	M	1963	Nepal	H-A Worker	Sotang, Solukhumbu	-	Details Other expeditions
Da Chhemba (Dachhamba) Sherpa	M	1968	Nepal	H-A Worker	Gudel-5, Solukhumbu	-	Details Other expeditions

References

0 recorded references.