Riko Tachibana (立花 里子, Tachibana Riko^?, born November 10, 1984) is a popular and award-winning Japanese adult video idol (AV idol). Taller than average, Tachibana debuted in 2003 and starred in many adult videos which emphasized her height. An extremely prolific actress, Tachibana had performed in over 200 AVs when she was awarded for Most Appearances at Japan's Adult Broadcasting Awards in 2007. Tachibana retired in March 2008.

Riko Tachibana was born in Tokyo on November 10, 1984. Tachibana is tall for a Japanese woman, reportedly standing 172 cm (nearly 5' 8") in early publicity, though her height was later reported to be 168 cm (5' 6"). Tachibana was not comfortable with her above-average size, saying, "I used to have a real inferiority complex about my height. I always thought guys liked little girls better." Tachibana's inferiority complex began to dwindle as she noticed that many men were attracted to her because of her height, wanting her to baby them. For example, when she was in a relationship with a high-level salaryman in his 30s, he asked her to pat his head while he lay in her lap, and tell him, "Good boy, good boy."

Maria Ozawa (小澤 マリア, Ozawa Maria^?, born January 8, 1986), who used the name Miyabi (みやび^?) early in her career, is a Japanese adult video (AV) actress known in Japan as an AV idol.

Ozawa was born in Hokkaidō, Japan. Her mother is Japanese and her father is French Canadian. Ozawa graduated from Hokkaido International School, and explains she has a higher ability of reading and writing English rather than Japanese. Ozawa played hockey on a daily basis, and often sang karaoke after classes. She claims she became sexually active at the age of 13, and learned the "48 sexual positions" from a book she purchased.

In 2002, when she was 16 years old, Ozawa debuted in a 30-second Japanese TV commercial for DARS Chocolate alongside two members of the Japanese pop group KinKi Kids. Ozawa is featured sharing chocolate with one of the two singers while secretly holding hands with the other.

Ozawa became acquainted with adult videos (AV) by watching sex tapes she borrowed from a friend's brother. Unlike most AV actresses, Ozawa was not scouted. Instead, she was introduced to the AV industry through a friend appearing in AVs. She began by modeling as Miyabi for the pornographic site Shirouto-Teien.com in June 2005, which resulted in several sets of photographs and a short hardcore gonzo video released in CD-R and DVD-R formats.