Yūichi Nakamaru (中丸雄一 Nakamaru Yuuichi, born on September 4, 1983 in Kita-ku, Tokyo, Japan), is a Japanese idol, singer-songwriter, actor, television personality, radio host, and a member of KAT-TUN.
He joined the talent agency Johnny & Associates in 1998 and then officially debuted as part of KAT-TUN in 2006.
Individually, he has acted in numerous drama serials and is most known as a commentator and host of his own segment on NTV information variety show "Sunday Countdown Show Shūichi".
Nakamaru was born in Kita-ku, but raised in Sumida-ku, Tokyo. He is the oldest child in a family of five composed of his parents and two younger sisters with 6 and 4 years age difference respectively. He has a fear of heights and phobia of needles.
His reason for applying to Johnny & Associates was that in the last year of junior high school, a female classmate who liked Johnny's idols told him to try out and prepared his application form to the point that he only needed to sign it.