noun
one move; a single move
Used in board games like go or shogi for a single move. Also extended metaphorically to a decisive action or strategy.
次の一手をじっくり考えた。
I carefully considered my next move.
noun
only way; only means; sole option
Indicates that there is no alternative; the one remaining course of action. Often used in desperate or final situations.
勝つための一手はこれしかない。
This is the only way to win.
noun
doing alone; single-handedly; monopoly
Used in the adverbial phrase 一手に to mean handling something all by oneself or monopolizing a task, responsibility, or market. Not used as a standalone noun for 'monopoly'.
See also: 一手に
彼が交渉を一手に引き受けた。
He took over the negotiations single-handedly.
その会社は市場を一手に握
That company has a monopoly on the market.
Compound of 一 (one) and 手 (hand, move). Originally a board game term for a single move, later extended to mean a single decisive action or sole control.