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Risa Saito (斉藤 りさ Saitō Risa) is a Japanese former actress. Her real name is Risa Otani (大谷理砂 大 Ōtani Risa). She is known for her role as Ryo Yumimura in Ultraman Dyna.


She has been active as a personality for "POWER BAY MORNING" (Monday / Tuesday) at bayfm since October 2005, but she started to take a break from the program in 2018, and although he returned once in March, he started the program by the end of the same month. He left the show and announced his retirement from performing arts at the same time. The reason is that Katsumi Otani, her husband and chairman of her office "Office Walker", died of cancer on January 7. After she retired from performing arts, she joined the management and she took over Katsumi's vocal group "Le Velvets" during her lifetime and devoted herself to her production business.


Year Title Role Notes
1997 Ultraman Dyna Ryo Yumimura
1998 Ultraman Tiga & Ultraman Dyna: Warriors of the Star of Light
1999 Booska! Booska!! Yayoi Komachi Episodes 11, 18 and 38
2000 Ultraman Tiga: The Final Odyssey Ryo Yumimura
2001 Ultraman Dyna: The Return of Hanejiro
2002 Ultraman Cosmos 2: The Blue Planet Officer Hyūga
2003 Ultraman Cosmos vs. Ultraman Justice: The Final Battle
2008 Great Decisive Battle! The Super 8 Ultra Brothers Ryo Yumimura
2012 Ultraman Saga



  • She was mainly active as a DJ such as bayfm.
  • Her hobbies are nail art and driving.