(informal) Japanese dialect that has merged the yotsugana (四つ仮名)

exhaust valve

Short for のり弁当.

red iron oxide / a kind of cloth first imported from Bengal during the Edo period, made using silk for the warp threads and cotton for the weft

Byeonhan confederacy

(slang) eating one's bento (packed lunch) before lunchtime (usually applied to middle and high school students)

Nagoya dialect

The Kansai dialect. Culturally, it is associated with comedy (specifically, ツッコミ) and is sometimes imitated by people from other regions (エセ関西弁(かんさいべん)) to exploit this.

Tōhoku dialect

Kyaraben, a style of elaborately arranged bento (Japanese boxed lunch) which features food decorated to look like people, characters from popular media, animals, and plants.