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Sudoku DS – Nikoli No 'Sudoku' Kettei Ban (High Road)

Puzzle Series Vol 4 – Kakuro

Nikoli No Sudoku 3 Daiyonshuu – Sudoku Numberlink Shikaku-ni-Kire Hashi-o-Kakero

Nikoli No Sudoku 2 Daiisshuu – Sudoku Nurikabe Heyawake