火災警報器 かさいけいほうき Meanings Noun fire alarm or sensor Kanji 火 fire. Read as カ. 災 disaster. Read as サイ. 警 warn. Read as ケイ. 報 report. Read as ホウ. 器 device. Read as キ. Words containing 火災警報器 住宅用火災警報器 (じゅうたくようかさいけいほうき) smoke detector (residential) Jinuma: Japanese Dictionary · Word lists