May 10 dawned clear. It appeared that we would be the first to climb to the summit from the north that year. This meant that we would have to establish the entire route all the way to the summit. From Camp 6 to the point of confluence with the North Ridge route was unknown territory. The 12 people in Camp 6 departed at 8a.m., and fixed 3 pitches of rope, traversing along the slope, before discovering leftover rope from the North Ridge route. We gained the top of the ridge, then contoured along the northern slope again, and established Camp 7 at 8,560m, at the base of the 1st Step, cutting platforms out of the snow surface and pitching 2 2-man tents. As soon as the tents were pitched, 6 sherpas descended to ABC. Since we had some time left, we extended the route to the 2nd Step (8,650m), and found that the ladder that had supposedly disappeared was still there although it was lying on the ground. Instead of using the special aluminum collapsible ladder that we had brought, we reinstalled the Chinese ladder. Then we continued to extend the route upward. Since there was room for only 4 people in Camp 7, we decided that 2 Sherpas would have to start their summit assault from Camp 6.
The alpenglow that day was unusually beautiful. Even in the afternoon there were no clouds, which is unusual. We had a good distant view, including Cho Oyu and Gyachung Kang, until the sun set.
May 11 again dawned clear and calm but the early clear weather was followed by light snowfall. We got up at 2 a.m., feeling as though we had not had any sleep, perhaps because of the tension. The Sherpas said that they couldn't sleep either. Each Japanese climber carried 1 oxygen bottle; each Sherpa carried 2. We started up at 4 a.m. by the light of headlamps. The 2 Sherpas in Camp 6 had started up at 3:30. We climbed the 1st Step in the darkness and emerged on the ridge above. Shortly we passed the site of the 1988 Japanese Alpine Club's Camp 7, and continued toward the 2nd Step. The step has 2 parts, the lower 10m and the upper 10m. Having reinstalled the Chinese ladder up the upper part, we passed the 2nd Step easily.
As we climbed up the ridge, dawn broke just before we reached the triangular snowfield. We fixed 1 pitch of rope up a 20m rocky pinnacle, then entered the triangular snowfield. Since this snowfield has a slope of 40 to 60 degrees, we fixed 1 pitch of rope to use on the descent. The snowfield started as a hard snow wall but eventually we had to break trail through softer snow. At this point Lhakpa Nuru, in the lead, increased his oxygen flow rate from 2 to 3 liters per minute and gave out a yell. We rounded some rocks on the North Face side, then, following rope left from the fall 1991 Japanese expedition that looked like it was ready to break, traversed for 2 pitches. Then we climbed 2 pitches up a rock slab gully, and, fixing rope, climbed straight up onto the summit ridge. A 15 minute climb up the snow ridge, less steep than what we had been climbing on, brought us to the summit. The summit was relatively broad, like a cornice; a surveying device with optics, that had been carried up the year before for survey work, was still standing. The time was 6:45a.m. (Nepal Time)
Shortly we received a congratulatory message on the radio from the manager of the Everest View Hotel. There followed congratulations from BC and ABC which we were happy to receive. Then we started taking pictures with our own cameras, the camera loaned to us by Kyodo News Service and the video camera loaned to us by NHK, and before we knew it we had been on the summit 1 hour, and we hurried to start our descent. We raced back through the Pinnacles, and descended all the way to ABC that day, arriving at 6:15p.m., just before the sun set. We had reached the summit on the 80th day afterleaving Tokyo.