expression, noun
ace up one's sleeve; trump card; last resort
A hidden resource, plan, or skill kept in reserve for a decisive moment. Often used when someone reveals a final, powerful move.
彼は交渉の最後に奥の手を出した。
He played his trump card at the end of the negotiation.
I still have a last resort to solve this problem.
expression, noun
secret skill; hidden technique
Refers to a special, often esoteric, technique or knowledge not shared openly. Common in contexts like martial arts, crafts, or professional expertise.
その職人は奥の手を弟子にだけ教える。
The craftsman teaches his secret techniques only to his apprentices.
expression, noun
Archaic literal meaning. In modern Japanese, 左手 (ひだりて) is used instead.
古文書では「奥の手」が左手を指すことがある。
In old documents, 奥の手 can refer to the left hand.