Samurai Sudoku is a variation of the regular Sudoku, in which you are given several Sudoku grids, which are conjoined via common 3x3 squares. The standard rules apply to each of the separate Sudokus in the puzzle.
The Samurai Sudokus below (sorted by difficulty) are shared by KrazyDad, a website with thousands of various types puzzle problems.
Remark: All materials are copyrighted, for personal use only. If you want to use any of them for a book, app, website or periodical, please contact the authors first.