Hiroko Tahara (田原裕子), also known as Hiroko Harada (原田裕子), born March 13, 1974, in Nagasaki, Japan, was the fourth actress to play Michiru Kaiou/Sailor Neptune in the Sailor Moon musicals. Her first musical was Sailor Moon Sailor Stars and her last was Eien Densetsu (Kaiteiban) - The Final First Stage.
Hiroko was the second longest running Sailor Neptune.
- Sailor Moon Sailor Stars
- Sailor Moon Sailor Stars (Kaiteiban)
- Eien Densetsu
- Eien Densetsu (Kaiteiban) - The Final First Stage