Japanese thistle; Cirsium japonicum
A species of thistle native to Japan, often seen in fields and mountains. The name is usually written in katakana as ノアザミ.
In spring, many Japanese thistles bloom in the fields.
Katakana spelling is common for plant names; usually written in kana.
Kanji form is rare; the plant is usually written in kana.
The name ノアザミ (野薊) literally means 'field thistle'. The exact historical derivation is uncertain, but it is a native Japanese plant name.