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Globally, Tsuyoshi (毅 , Tsuyoshi , 剛 ) is a widespread dominantly boy's, but seldom female first name. The given name Tsuyoshi is habitual in China, where it is quite a common dominantly masculine, but uncommonly girly name, Japan, where it is quite a rare gender-neutral name, and Indonesia, where it is a very rare boy's name. Much less frequently, Tsuyoshi is the last name as well as the forename.
Tsuyoshi is also a name for the fictitious and mythical characters: Wu Gang and Xue Gang , the fictional character from literature and dramas about Sui-Tang period.