Buku Sudoku (titled Buku Números in Mexico and Buku数字パズル in Japan) is a downloadable puzzle game developed by Ukrainian studio Absolutist Ltd and published by Merscom based on Sudoku for the Windows PC's.

The game allows the player customization options by letting them choose different background and tile themes to modify their Sudoku board.

The game also features a display hints option for gamers that like to know when they have mis-entered a number.

The Xbox Live Arcade version of Buku Sudoku will feature downloadable content packs.

Buku Sudoku received mixed reviews upon the game's release on the Xbox 360.