Yuko Nagashima (永島 由子, Nagashima Yūko, born July 7, 1970) is a Japanese voice actress. She uses the alias Natsuki Yoshino (吉野 なつき, Yoshino Natsuki) for her work on adult content. Yuko Nagashima (永島 由子, Nagashima Yūko, born July 7, 1970) is a Japanese voice actress. She uses the alias Natsuki Yoshino (吉野 なつき, Yoshino Natsuki) for her work on adult content.