noun
one dance; one game (e.g. shogi)
Counts a single round or performance of an activity like a dance or a board game. Often used in contexts like 一差し舞う (to dance one dance) or 一差し指す (to play one game of shogi).
宴席で一差し舞を披露した。
I performed one dance at the banquet.
将棋を一差し指しましょう。
Let's play one game of shogi.
一局 is the standard counter for board games like shogi or go, while 一差し is a more literary or traditional way to count a single game, often implying a quick or informal match.
一曲 is the common counter for a piece of music or a dance performance, whereas 一差し specifically counts a dance as a single act, often in a traditional or festive setting.
Compound of 一 (ひと, 'one') and 差し (さし, the continuative form of 差す, 'to make a move' or 'to perform'). The kanji 差し/指し relate to the action of making a move in a game or a gesture in a dance.