Photo/IllutrationShigeru Joshima, second from right, and other members of idol group Tokio hold a news conference in Tokyo’s Chiyoda Ward on May 2. Tatsuya Yamaguchi is absent. (Ryo Ikeda)

Crestfallen after being accused of committing indecent acts with a high school girl, the 46-year-old bassist of popular all-male idol group Tokio says his best course is to quit the band.

Tatsuya Yamaguchi's proposal came ahead of a Tokyo District Public Prosecutors Office decision May 1 not to indict him.

Yamaguchi made the offer when he consulted his four band mates April 30, Tokio frontman Shigeru Joshima told a news conference in Tokyo on May 2.

However, Joshima said a decision is pending.

At the news conference, Joshima and three fellow members bowed deeply as an expression of remorse to the girl and her family.

Prosecutors decided to take no action after the girl said her desire for revenge had waned. Yamaguchi made clear he intended to quit the idol scene indefinitely.

Johnny Kitagawa, president of talent agency Johnny & Associates that represents Tokio, said, “All of us are determined to do our best to recover the trust of fans. We take this incident seriously.”

During questioning by Tokyo police, Yamaguchi acknowledged that he invited the minor to his apartment in Tokyo's Minato Ward on Feb. 22. She arrived with a friend, and Yamaguchi, claiming he was drunk, admitted to forcibly kissing her.

Police referred the case to prosecutors in mid-April, saying they sought “strict punishment,” in short, an indictment.