Nikoli (publisher)

[1] Nikoli was established in 1980,[1] and became prominent worldwide with the popularity of Sudoku.

[2] Nikoli is notable for its vast library of "culture independent" puzzles.

An example of a language/culture-dependent genre of puzzle would be the crossword, which relies on a specific language and alphabet.

Nikoli's Sudoku, the most popular logic problem in Japan,[3] was popularized in the English-speaking world in 2005, though that game has a history stretching back hundreds of years and across the globe.

[4] The magazine has invented several new genres of puzzles, and introduced several new games to Japan.