Yūki 100%

"Yūki 100%" (勇気100%) is the 21st single by Japanese boyband Hikaru Genji, released on May 13, 1993. It was used as the theme song of the animated series Nintama Rantarō, while the B-side "Hohoemi o Azukete" was used as an insert song for the same anime.

The song has been re-used four times as the Nintama Rantarō opening theme song. The original version was used for season 1 (1993–1994), while their self cover under the name Genji Super 5 was used for seasons 2 through 9 (1994–2001). Johnny's Entertainment groups then covered the song three times: Ya-Ya-Yah (seasons 10–16, 2002–2008), Hey! Say! JUMP (season 17, 2009) and NYC (season 18, 2010).

NYC cover
"Yūki 100%" was covered as the debut song of the Japanese boy band "NYC" (abbreviation of its three members' names, Nakayama, Yamada, and Chinen). It was released under J Storm on April 7, 2010.

The single was released in two versions: limited edition which includes the promotional video and the jacket shooting while the regular edition comes out with instrumentals. The limited edition came with three NYC photo cards type A and the first press of the regular edition came with three NYC photo cards type B. "Yuuki 100%" was used as the fifth opening theme for the anime Nintama Rantaro while "Yume no Tane" its B-side was used as the 20th ending theme. It peaked at #1 on the Oricon charts and sold 120,516 copies in total in 13 weeks.

Limited Edition

 * CD
 * 1) Yuuki 100% (勇気100%)
 * 2) Yume no Tane (ゆめのタネ)
 * DVD
 * 1) Recording & Jacket Shooting Off Shot (レコーディング＆ジャケット撮影オフショット)

Regular Edition

 * 1) Yuuki 100% (勇気100%)
 * 2) Yume no Tane
 * 3) Yuuki 100% (勇気100%) (instrumental)
 * 4) Yume no Tane (instrumental)