The opening position above can be reached by different move sequences, some of which are shown below.
Black closing their bishop diagonal and aims for the Gold Excelsior castle.
White aims for a Mino castle and develops the left knight for attacking.
Game example: Toshiaki Kubo vs Hisashi Namekata's Meijin ranking tournament on March 15, 2015.
[2] ４→３戦法 The player starts off playing a Fourth File Rook position with an open bishop diagonal that then transitions to a Third File Rook position after the player moves their king into an Incomplete Mino castle.