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Around the world, Ken'Ichi (健一 , ケンイチ , 谷川 ) is quite a rare mostly male, but uncommonly girly forename. The first name Ken'Ichi is characteristic of Eastern Asia, particularly Japan, where it is a rare male name, and China, where it is a rare largely boy's, but infrequently girly name. More prevalently, Ken'Ichi is the last name as well as the forename.