Japanese carpenter ant
Refers specifically to Camponotus japonicus, a large black ant native to Japan. Often called クロオオアリ (黒大蟻) as well.
See also: クロオオアリ
I found a Japanese carpenter ant in the garden.
Katakana spelling is common for this species name.
Kanji spelling is rare; the word is usually written in kana.
Compound of 熊 (kuma, 'bear') and 蟻 (ari, 'ant'), likely referring to its large size and dark color.