開炉 かいろ first lighting of the hearth in a Zen… Meanings noun first lighting of the hearth in a Zen temple (first day of the 10th or 11th month) Its kanji 開 カイ · ひら.く、ひら.き、-びら.き、ひら.ける、あ.く、あ.ける open, unfold, unseal 炉 ロ · いろり hearth, furnace, kiln, reactor