The character 火
火 (hi in kun'yomi, ka in on'yomi) means fire. The character is a pictograph of a flame — the central stroke representing the main fire body, with side strokes like sparks or rising heat. It is one of the simplest and most ancient kanji.
火 is Tuesday's element (火曜日, kayoubi — fire day) and one of the five classical elements. In the traditional five-element system, fire represents energy, transformation, and the south direction.
火 in everyday Japanese
火 forms core vocabulary: 火事 (kaji — fire/house fire), 花火 (hanabi — fireworks, literally "flower fire"), 火山 (kazan — volcano, literally "fire mountain"), 火力 (karyoku — firepower/heat power), 点火 (tenka — ignition), 消火器 (shoukaki — fire extinguisher).
花火 (fireworks) is particularly beloved in Japanese culture — summer fireworks festivals (hanabi taikai) are among the most anticipated events of the year, drawing enormous crowds to river banks and beaches.
火 as a radical appears in kanji related to heat, burning, and light: 炎 (flame/inflammation), 焼 (burn/bake), 炭 (charcoal), 灰 (ash), 灯 (lamp). When the fire radical appears at the bottom of a character, it often takes a four-dot form: 黒 (black), 熱 (heat), 焦 (scorch).
Fire symbolism in Japan
Fire has deep ritual significance in Japan. The sacred fire (御神火, goshinka) at Shinto shrines is never allowed to go out. The Obon festival uses lanterns and small fires to guide the spirits of ancestors. And the most famous symbol of Japanese summer, the firework, transforms 火 from danger into celebration — a profound cultural reframe.
Explore the fire symbol
Full kanji page for 火 with readings, compounds, and stroke order.