Hikers should not underestimate the risks of climbing in Japan during the volatile spring transition in May, a mountaineering expert has warned after two Hong Kong men became stranded in the Northern Alps, one of whom later died. Veteran mountaineer Chung Kin-man said on Wednesday that climbers might develop a false sense of safety due to warmer weather in lowland areas in May, even as conditions in the mountains remained unstable, with risks of snowstorms, strong winds and freezing...