Yumiko Nakajima (中島裕美子) is a Japanese voice actress employed by B-Box. When voicing adult games she often goes under the name Yuna Yamada (山田 ゆな).
- ef - First Fan Disc - Yuko Amamiya
- Ef: the first tale - Yuko Amamiya
- Ef: the latter tale - Yuko Amamiya
- Mana Khemia: Alchemists of Al-Revis - Additional Voices
- Tenshi no nichiyōbi Ef - a fairy tale of the two: Pleasure Box - Yuko Amamiya
- Number of VA titles on this wiki: (7)