Everest | 2005 N Col-NE Ridge

A Japan expedition to Everest in 2005 via N Col-NE Ridge, led by Masakazu Okuda. Summit reached on 27th May 2005. 3 members recorded.

Expedition Details

Field	Value
ID	4888
Imported	2026-03-06 18:04:49.359634
Expedition ID	EVER05103
Peak ID	EVER
Year	2005
Season	1
Host Country	2
Route 1	N Col-NE Ridge
Route 2	-
Route 3	-
Route 4	-
Nationality	Japan
Leaders	Masakazu Okuda
Sponsor	Japanese Spring Cho Oyu Expedition
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	2005-05-09
Summit Date	2005-05-27
Summit Time	0710
Summit Days	18
Total Days	22
Termination Date	2005-05-31
Termination Reason	1
Termination Notes	-
High Point (m)	8849
Traverse	False
Ski	False
Paraglide	False
Camps	3
Fixed Rope (m)	0
Total Members	2
Summit Members	2
Member Deaths	0
Total Hired	1
Summit Hired	1
Hired Deaths	0
No Hired	False
O2 Used	True
O2 None	False
O2 Climb	True
O2 Descent	True
O2 Sleep	True
O2 Medical	False
O2 Taken	False
O2 Unknown	False
Other Summits	Attempted Cho Oyu (CHOY-051-34)
Campsites	BC(09/05),C1(13/05,6400m),C1(24/05,7050m),C2(25/05,7800m),C3(26/05,8300m),Smt(27/05)
Route Notes	Kato climbed without oxygen to top so he made his C2 at 7900m and no C3, while Ukada's C3 was at 7800m because started using oxygen from C1 to top and to C2. Okuda left C3 for top at 1:00 am NST and on top 7:10 am with Phurba Chhiri (Phurba Chhiri used oxygen in C3 to top to 8400m, then gave his oxygen to Kato). Okuda to ABC same day, Phurba Chhiri to C1 that day. Kato left for top from his C2 at 7900m without Sherpa; left C2 at 6:30 pm 26 May and on top at 8:20 am NST; at 8400m lost most of his sight in both eyes at 2:00 pm because of oxygen deprivation; Phurba Chhiri gave his oxygen to Kato and accompanied him and talked him down the fixed rope to C2, sight not improving. Kato got frostbitten nose during night of 26-27 May which was very cold and windy. Slept in C2 and ABC 28 May. Sherpa: Phurba Chhiri, Saframa, Manaslu, Ever X2, etc
Accidents	Kato frostbitten nose and temporary blindness
Achievement	-
Agency	Cosmo Treks
Commercial Route	True
Standard Route	True
Primary Route	False
Primary Member	False
Primary Reference	False
Primary ID	-
Checksum	2459663
Year	2005
Summit Success	True
O2 Summary	Used
Route (lowercase)	n col-ne ridge

Members

Field	Value
ID	37584
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER05103
Member ID	02
Peak ID	EVER
Year	2005
Season	1
First Name	Yoshinobu
Last Name	Kato
Sex	M
Age	0
Birth Date	-
Year of Birth	1976
Calculated Age	29
Citizenship	Japan
Status	Climber
Residence	Minami Alps, Yamanashi, Japan
Occupation	Alpine gear shop salesman
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)	8849
Summit Date 1	2005-05-27
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0820
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	False
O2 Descent	True
O2 Sleep	False
O2 Medical	False
O2 Notes	From 8400m in descent
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	(1976-2008) Died 1 Oct 2008 on Kula Kangri (Tibet) from avalanche
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2440727
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	yoshinobu kato
Year of Birth	1976
Year	2005
Age at Expedition	29
Role	Member

Field	Value
ID	37585
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER05103
Member ID	01
Peak ID	EVER
Year	2005
Season	1
First Name	Masakazu
Last Name	Okuda
Sex	M
Age	0
Birth Date	-
Year of Birth	1966
Calculated Age	38
Citizenship	Japan
Status	Leader
Residence	Kathmandu
Occupation	Alpine guide & trekking agency staff member
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)	8849
Summit Date 1	2005-05-27
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0710
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 C1 to top and to C2
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	2437314
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	masakazu okuda
Year of Birth	1966
Year	2005
Age at Expedition	39
Role	Leader

Field	Value
ID	37586
Imported	2026-03-06 18:06:05.675609
Expedition ID	EVER05103
Member ID	03
Peak ID	EVER
Year	2005
Season	1
First Name	Phura Chhiri (Phurba Chhiri)
Last Name	Sherpa
Sex	M
Age	0
Birth Date	-
Year of Birth	1969
Calculated Age	36
Citizenship	Nepal
Status	H-A Worker
Residence	Sakpharma, Lokhim-9, 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)	8849
Summit Date 1	2005-05-27
Summit Date 2	-
Summit Date 3	-
Summit Time 1	0710
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	In C3 to top to 8400m, then gave his oxygen to Kato
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	3rd ascent of Everest
Necrology	-
Summit Bid	5
Summit Term	1
HCN	0
Checksum	2438281
Summit Note 1	-
Summit Note 2	-
Summit Note 3	-
Death Route	-
Name (lowercase)	phura chhiri (phurba chhiri) sherpa
Year of Birth	1969
Year	2005
Age at Expedition	36
Role	Hired

3 recorded members.

Name	Sex	Year of Birth	Citizenship	Status	Residence	Occupation
Yoshinobu Kato	M	1976	Japan	Climber	Minami Alps, Yamanashi, Japan	Alpine gear shop salesman	Details Other expeditions
Masakazu Okuda	M	1966	Japan	Leader	Kathmandu	Alpine guide & trekking agency staff member	Details Other expeditions
Phura Chhiri (Phurba Chhiri) Sherpa	M	1969	Nepal	H-A Worker	Sakpharma, Lokhim-9, Solukhumbu	-	Details Other expeditions

References

0 recorded references.