KATHMANDU: A Japanese climber who was attempting the first summit of Mount Everest since a deadly quake-triggered avalanche destroyed part of base camp in April said on Sunday he had turned back. Thirty-three year-old Nobokazu Kuriki, who lost nine fingers to frostbite during a 2012 attempt to climb Everest, was the only mountaineer pursuing the summit this year after an avalanche set off by a massive quake killed 18 people at base camp. The disaster saw hundreds of climbers abandon their bids to ascend the 8,848-meter (29,029-foot) peak, marking a second spring season with virtually no one reaching the summit. The deaths of 16 Nepali guides in an avalanche in 2014 sparked a shutdown that year. It was Kuriki’s fifth attempt to climb the world’s highest mountain.