Mika Hijii (肘井 ミカ, Hijii Mika, born 肘井 美佳, October 13, 1982 in Fukuoka Prefecture, Japan) is a Japanese actress and gravure idol best known for her role as Kaoru Mitsuki in the Garo series. She is also known in the western world for her role as Namiko Takeda in the 2009 martial arts film Ninja and its 2013 sequel Ninja: Shadow of a Tear. Mika Hijii is affiliated with Stardust Promotion. She holds a bachelor's degree in business administration from Hosei University. In June 2020, she changed her stage name, spelling her given name in phonetic katakana rather than kanji.