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Cognomen タイチ (Taichi , タイチ , Tajči) , worldwide, is a common last name. The surname タイチ is characteristic of Japan, where it is quite a common surname, Singapore, where it is a rare surname, and Morocco, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Japan, China, and Indonesia. Very seldom, タイチ is the forename as well as the last name.