Michiru is a common Japanese given name. People named Michiru include:
Michiru Jo, a 1970s J-Pop artist
Michiru Oshima, a Japanese composer
Michiru Shimada, a Japanese anime scriptwriter
Michiru Yamane, a video game composer
Michiru Yuimoto, a Japanese voice actress
Monday Michiru, a Japanese-American actress, singer, and songwriter
Fictional characters:
Michiru Aida, the protagonist of the Japanese TV drama Last Friends
Michiru, a character in the Japanese visual novel series Air
Sailor Neptune, aka Michiru Kaioh, one of the central characters in the Sailor Moon metaseries
Michiru Nishikiori, a character in the Japanese anime and manga series Kamichama Karin.