Sudoku started to reach worldwide mainstream popularity in the early 2000s, such as 2004 when Sudoku puzzles started to be featured in the Times of London. Sudoku was very popular in Japan because Japanese people love puzzles – many people in Japan love to do puzzles while riding on the train during their long commutes – and Sudoku was an easy puzzle to translate across language barriers or cultural boundaries no matter what language you speak, everyone in the world can recognize the numbers 1-9, and the rules of Sudoku are very simple and do not require any particular cultural context to be able to understand. The first Sudoku puzzles in Japan were published in 1984, and the word “Sudoku” is a registered trademark in Japan. One reason why Sudoku is known by its Japanese name and not by its original “Number Place” name is because Sudoku became widely popular in Japan before it “took over” the rest of the world. Garns died in 1989, before Sudoku became a worldwide success. The first modern Sudoku puzzle with the rules and constraints that we recognize today was published in 1979 by Dell Magazines under the name of “Number Place” and was invented by Howard Garns, a retired architect and freelance puzzle maker. Although these early French puzzles were not exactly the same as what we know Sudoku to be today, they still deserve credit for being the first Sudoku-like puzzles. Sudoku was actually not invented in Japan – the first number puzzles that were similar to modern Sudoku appeared in a French newspaper in 1895, where a 9×9 square broken into rows, columns and diagonals contained only the numbers 1-9 and each number could only be used once.

Sudoku origin