Kaiten

Japanese: 回天 - かいてん

〘Noun〙① (Meaning to turn the heavens around) To completely change the times. To restore a weakened momentum. ※Shobogenzo (1231-53) Bodhisattva's Fourfold Provisions "We should learn that by speaking kindly, we have the power to turn the heavens around." ※Taiheiki (late 14th century) Volume 3 "They are those who wish to grasp the opportunity of the world and unleash the power of the heavens ." [Book of the Later Han - Biography of the Eunuchs] ② A human-operated torpedo not included in the midget submarines, invented and used by the Imperial Japanese Navy in World War II. It is a one-man vessel loaded with explosives and used to ram enemy ships. ※Sakurajima (1946) by Umezaki Haruo "They say they are being sent out to repair kaiten and shinyosen."

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙① (天をめぐらすの意) 時勢を一変すること。衰えた勢いを盛り返すこと。※正法眼蔵（1231‐53）菩提薩埵四摂法「愛語よく廻天のちからあることを学すべきなり」※太平記（１４Ｃ後）三「天下の機を呑で、回(クヮイ)天の力を出さんと思へる者共なれば」〔後漢書‐宦者伝〕② 第二次世界大戦で、旧日本海軍が考案使用した、特殊潜航艇に含まれない、人間の操縦する魚雷。一人乗りで爆薬を積み、敵艦に体当たりする。※桜島（1946）〈梅崎春生〉「回天や震洋艇の修理のために派遣されるのだと言う」

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