In order to get 100% Completion and the almighty Perfectionist trophy achievement, you will need to complete the Shogi mini-game section
Shogi just like with Mahjong is another foreign game that not many people know how to play or understand the rules. Thankfully though there is a rather cheap way of going around it, one which requires a single game and an easy and comfortable win with no Knock Backs.
However, below is hopefully a guide which can help solve this task!
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