Yuna is from Tokyo, Japan. She shares the name Yuna with another big boob Asian model called Yuna Kawase who also was born on the same day but they aren't the same person. I think it's customary to list AV models birthday as Valentines Day.
Not much is out there (in English, anyways) about this model except that she likes cars, parks and walking.
Yuna Miruku
Momoka Nishina
Hitomi Tanaka
Julia Boin
Shion Utsunomiya
Hana Haruna
Mayu Koizumi
Ren Kajika