Kenji Urai (浦井健治), born August 6, 1981, in Tokyo, Japan, was the sixth actor to play Mamoru Chiba/Tuxedo Mask in the Sailor Moon musicals. His first performance was in 2001's Tanjou! Ankoku no Princess Black Lady, and his last show was Mugen Gakuen - Mistress Labyrinth in 2002.
Kenji was the third longest-running Tuxedo Mask.
Since leaving the musicals, Kenji has performed in many other musicals, several also starring former Sera Myu actresses (such as Hikari Ono, Emi Kuriyama, and Akiko Nakayama). He is often cast in prominent roles in Toho-produced musicals, such as Rudolf in Elisabeth and Alfred in Tanz der Vampire. Kenji has also appeared in at least one Japanese film.
- Tanjou! Ankoku no Princess Black Lady
- Tanjou! Ankoku no Princess Black Lady (Kaiteiban) - Wakusei Nemesis no Nazo
- 10th Anniversary Festival - Ai no Sanctuary
- Mugen Gakuen - Mistress Labyrinth