Abstract Haploporus subtrameteus, a rare polypore, is
newly reported for Japan. This fungus was known only from
three localities in the Russian Far East, Altai Mts., and
three in China. The Japanese material was on a dead tree
of Padus grayana around Aokigahara-marubi, Mt. Fuji.
This article gives detailed morphology based on the Japanese
collection and a photo in the natural habitat.