Two artists are known in Japan. 1. name: yuiko Birthday: May 18 She belongs to doujin circle “Primary”. “ゆいこ” is used until 2008, and “yuiko” has been used since 2009. http://primary-yuiko.com/ 2. Yuiko (ゆいこ) was born on December 9, 1977, in Tokyo. She began piano lesson at age 5 and developed her absolute pitch. During her junior high school years, she joined the choir and also stuck on rock and punk music. She also loved drawings and thought to become a cartoonist at first.