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Worldwide, Shigen (士根 , 仕根 , 拾根 ) is quite a rare boy's first name. The forename Shigen is characteristic of China, where it is a rare male name, and India, where it is an extremely rare dominantly masculine, but uncommonly feminine name. Very seldom, Shigen is the last name as well as the forename.
Shigen is also a name for the fictitious and mythical characters: Shigen Naoe , the fictional character from The Last Blade.