The Hasetsune Cup (ハセツネ, hasetsune), also referred to as The Japan Mountain Endurance Race　(日本山岳耐久レース), or Hasegawa Tsuneo Cup (長谷川恒男カップ), is an annual ultramarathon sporting event held since 1992 in the mountain area in Tokyo, Japan to commemorate a Japanese alpinist, Tsuneo Hasegawa　(長谷川恒男).

The distance of the race is 71.5 kilometres (44.4 miles), the cumulative altitude gain is 4,582m, and the time limit is 24 hours.

[3] Men's course record is 7:19:13 achieved by Toru Higashi (東　徹) in 2013, and ladies' course record is 8:54:07 achieved by Norimi Sakurai (櫻井教実) in 2008.

Men Ladies 1,984 finishers out of 2,344 starters (2,574 entries).

Men Ladies 1,725 finishers out of 2,158 starters (2,488 entries).