www.Hanzi-Sudoku.com is part of
www.Kanji-Sudoku.com as both names are describing Sudoku puzzles with Chinese characters: - 'Hanzi' in the Chinese language, 'Kanji' in the Japanese language (the search term 'Kanji' however is by far more popular in the internet than 'Hanzi').
We refer to 'Hanzi' either when it's about the usage of Chinese characters ...
... in the Chinese language (e.g.: Hanzi Sudokus) or traditional Chinese characters as used in Hong Kong and Taiwan (e.g.: Chinese Zodiac Animal Signs) or simplified Chinese characters as used in China, Singapore & Malaysia (e.g.: 333 Hanzi-in-a-Day).