| Family | Ranunculaceae |
| Subfamily | Ranunculoideae |
| Tribe | Delphinieae |
| Scientific name | Aconitum japonicum Thunberg |
| Synonyms | Aconitum faurei Léveillé & Vaniot; Aconitum japonicum Thunberg ex Murray subsp. subcuneatum (Nakai) Kadota; Aconitum lycoctonum L. var. ochroleucis Savatier; Aconitum subcuneatum Nakai |
| Common name | (Japanese common name) oku torikabuto (オクトリカブト, 奥鳥兜 [meaning: oku aconite (oku = an old name of Tohoku region)]) |
| (English common name) monk's hood | |
| Distribution | (Japan) Hokkaido, Honshu (north of Central region) |
| (Other nations) none | |
| Habitat | Mountane forest |
| Chromosomal number | 2n=32 |
| Description | Plants electing 100cm tall. Leaves 18cm wide. Flowers blue 4-4.2cm long, flowering in August to September. Fruits 20-22mm long, seeds 3.5mm long. Perennial plants. |
| Reference | Aconitum japonicum Thunb. |
| Pharmaceutically active plant extract and composition thereof (US Patent 4352796/1982) | |
| Hair growth stimulant (US Patent 5401503/1995) | |
| Transdermal delivery system for alkaloids of aconitum species (US Patent 6896898/2005) | |
| Secondary metabolite production via manipulation of genome methylation (WIPO Patent WO/2006/113481) | |
| Note | Containing aconitine. |
| October 2007 at Tsukuba Botanical Gardem |
October 2007 at Tsukuba Botanical Gardem |
October 2007 at Tsukuba Botanical Gardem |
| October 2007 at Tsukuba Botanical Gardem |
October 2007 at Tsukuba Botanical Gardem |