天下の宝刀 てんかのほうとう Meanings Expression, Noun one's last resort; trump card (non-standard variant of 伝家の宝刀) See also: 伝家の宝刀 (でんかのほうとう). Kanji 天 heaven. Read as テン. 下 down 宝 treasure. Read as ホウ. 刀 katana. Read as トウ. Word lists Idioms Jinuma: Japanese Dictionary · Word lists