Chokai thistle; Cirsium chokaiense
A species of thistle native to Japan, named after Mount Chōkai. Botanical term.
The Chokai thistle is an endemic species found around Mount Chōkai.
Kanji spelling is rare; the plant name is usually written in kana.
Named after Mount Chōkai (鳥海山), where the plant is found. The derivation is straightforward from the place name and 薊 (thistle).