Adventurer Mitsuo Oba reached Canada's Ward Hunt Island on June 23, completing a solo walk across the frozen Arctic Ocean.

Oba, from Yamagata Prefecture, became the first man in the world to trek across the Arctic alone, a Japanese group supporting him said June 24. The feat was completed four months after Oba left Russia's Komsomolets Island on the 1,730 km trek to Ward Hunt Island via the North Pole, the group said.

Oba left Japan on Feb. 11 and set out on his walk across the Arctic Ocean on Feb. 23. He passed the North Pole on May 3. He had failed to reach the pole in annual attempts since 1994 and has lost all his toes to frostbite in the process.