快刀 かいとう Meanings Noun sharp sword Kanji 快 pleasant. Read as カイ. 刀 katana. Read as トウ. Words containing 快刀 快刀乱麻 (かいとうらんま) solving a problem swiftly and skillfully 快刀乱麻を断つ (かいとうらんまをたつ) to cut the Gordian knot Jinuma: Japanese Dictionary · Word lists