In Japan Mannia fragrans is known to be distributed and to have several habitats in the central Honshu. We confirmed that this species was growing in Tsukuba, Ibaraki Prefecture, in 2020. The habitat was the grassland between the parking lot and the building. This species was overwintering, and the matured sporophytes were observed not only in December but also in March.

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Diphyscium kashimirense（H.Rob.）Magombo Specimens examined: Japan, Honshu, Hyogo-ken, Sayo-gun, Sayo-cho, Oohata, 180 m elev., 34.9416° N, 134.4174° E, on boulder at streambed, in secondary deciduous forest with plantation of Cryptomeria japonica, 14 Oct. 2021, H. Akiyama 26974 （HYO）: Okayama-ken, Mimasaka-shi, Takimiya, Kotohiki Water Fall, 185 m elev., 34.9328° N, 134.2045° E, on cliff near small waterfall, 6 Oct. 2012, Y. Tateishi 30854（HIRO）; ibid., 16 Mar. 2022, H. Akiyama 27165 & 27166（HYO）.

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Oedipodium griffithianum （Dicks.） Schwägr. Specimens examined: Kyushu, Oita-ken, Bungo-ono-shi, Mt. Katamuki, 1,540 m elev., on wet rock. 13 May 2021, coll. T. Sato s.n. （TNS-247403, NICH-509756）. 標本には採取地の位置情報を記載しているが，絶滅危惧種保護の観点から本稿への記載は控える．

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