Where did Sudoku originate?

Modern Sudoku originated as an American puzzle called Number Place and was later introduced to Japan by the puzzle publisher Nikoli in 1984. Nikoli refined its presentation and shortened a longer Japanese title to Sudoku, the name that later spread worldwide.

From Number Place to Sudoku

Nikoli says it found Number Place in an American puzzle magazine and published it for Japanese readers in 1984. Its first Japanese title was "Suuji wa dokushin ni kagiru," which the publisher later abbreviated to Sudoku. Nikoli's official history explains that "su" means number and "doku" means single in the shortened name.

The underlying idea also has older mathematical relatives, especially Latin squares, but the familiar 9x9 newspaper puzzle with 3x3 boxes belongs to the modern Number Place and Sudoku line.

Why people think it is purely Japanese

The Japanese name became far more recognizable than Number Place as the puzzle spread internationally. Japan was central to its development and identity, but the modern story crosses both countries: an American magazine supplied the puzzle Nikoli adopted, and a Japanese publisher supplied the name and presentation the world remembers.