瞬間湯沸かし器 しゅんかんゆわかしき Also written 瞬間湯沸し器 Meanings Noun instantaneous water heater; on-demand water heater irritable person; hot-tempered person Kanji 瞬 instant. Read as シュン. 間 interval. Read as カン. 湯 hot water 沸 boil. Read as わかす. 器 device. Read as キ. Example sentences あいつは瞬間湯沸かし器なんだよ。He easily gets angry. Jinuma: Japanese Dictionary · Word lists