伝家の宝刀 でんかのほうとう Also written 殿下の宝刀 Meanings Expression, Noun one's last resort; trump card treasured family sword (orig. meaning) Kanji 伝 transmit. Read as デン. 家 home 宝 treasure. Read as ホウ. 刀 katana. Read as トウ. Words containing 伝家の宝刀 伝家の宝刀を抜く (でんかのほうとうをぬく) to employ one's secret weapon Word lists Idioms Jinuma: Japanese Dictionary · Word lists