Yumiko Oku Name: Yumiko Oku Date of Birth: Height: , Cup Size: UnknownSign: UnknownBlood Type: UnknownBirthplace: Unknown Watch JAV Movies Yumiko Oku has appeared in You may also like the following JAV Idols... Suzu Toyosawa Haruka Sakimoto Miyuki Fujino Tohko Yamamoto Mayuka Kawanaka Mina Nakano