shogi piece
Refers to any of the flat, pentagonal pieces used in the Japanese board game shogi.
See also: 将棋
There are 40 shogi pieces in total.
He carefully arranged the shogi pieces one by one.
駒 is a general term for a piece in board games like shogi or chess; 将棋の駒 explicitly specifies a shogi piece.
Compound of 将棋 (shogi) + の (possessive particle) + 駒 (piece). The word 駒 originally referred to a horse or foal, and by extension came to mean a game piece.