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Around the world, ちあき (Chiaki
, ちあき) is quite a rare primarily girly, but very seldom masculine first name. The forename ちあき is habitual in Japan, where it is quite a rare predominantly female, but very infrequently masculine name, Hong Kong, where it is a rare female name, and Australia, where it is a very rare girly name. In absolute terms, it most frequently occurs in Japan, the United States, and Indonesia. Very seldom, ちあき is the last name as well as the forename.
ちあき is also a name for the fictitious and mythical characters: Chiaki Mamiya , the fictional character from The Girl Who Leapt Through Time; Chiaki Ōgaki , the fictional character from Laid-Back Camp; Chiaki Kanda , the fictional character from Atsumare! Fushigi Kenkyū-bu; Chiaki Nanami , the fictional character from Danganronpa 2: Goodbye Despair and Chiaki Sakashita , the The Fruit of Grisaia's character.