Gentle Rainbow (素直な虹, Sunao na Niji) performed by "SURFACE", was the fifth ending song in the Japanese version of Part II of the Naruto: Shippūden series.
Lyrics
Rōmaji
Kodomo no koro mita niji wo ima miageru to
Nanairo de wa naku yagate kiri ga kakari
Jikan wa sugi kawatte yuku
Kimi wo sagashitemo doko ni mo inai
Me wo toji kokoro hiraite mata nagamete mitemo
Nani mo kawaranai no ka tashikamete mitai
Sunao ni narereba
Kono kiri ga hareru to kokoro ni negai sou sakenderu
Nanika wo nakushite shimatta koto de
Sou te ni shita mono mo kitto arun darou
Dakedo mada bokura wa otona ni tomadoi
Ikite yuku sube sagashiteru
Rōmaji (Full Version)
Kodomo no koro mita niji wo ima miageru to
Nanairo de wa naku yagate kiri ga kakari
Jikan wa sugi kawatte yuku
Kimi wo sagashitemo doko ni mo inai
Me wo toji kokoro hiraite mata nagamete mitemo
Nani mo kawaranai no ka tashikamete mitai
Sunao ni narereba
Kono kiri ga hareru to kokoro ni negai sou sakenderu
Nanika wo nakushite shimatta koto de
Sou te ni shita mono mo kitto arun darou
Dakedo mada bokura wa otona ni tomadoi
Ikite yuku sube sagashiteru
Ame ga yamu to fuini kimi wa hodoukyou ni nobori
Sora wo yubisashite mujaki ni waratteta
Kieiru you na sukete niji wo
Nanimo ienai mama nagamate ita ne
Hontou wa ano toki zutto
Kimi no yokogao wo miru koto ni muchuu ni natteta
Wasurenai tame ni
Sunao ni narezu ni
Tada kimi no namae wo kokoro no naka de sou sakenderu
Kimi wo ushinatte made te ni shitai mono nado
Nai hazu na no ni doushite darou
Mereta kami wo dzutai ochiru no wa
"Sayonara" to iu namida datte ne
Ame agari wa ima mo
Hodoukyou kara semai sora miage
Kakehashi wo sagasu kedo
Kimi no moto e tadoritsukenainda
Monokuro no sekai ni iru
Kotoba ni dekizu ni
Tojikometa omoi wo ima sara kimi ni toikakete miru
Yowasa no sei ni shite nigedashita no wa
Sou kimi no hou ja nai boku no hou da yo
Sunao ni narereba
Kono kiri ga hareru to kokoro ni negai sou sakenderu
Nanika tarinakute mo ima aru iro de
Sou boku no sekai wo nurikaete mitai
Itsuka mata kimi ni aeru nara
Sunao ni omoi tsutaeru kara
Sunao na niji wo egaite miru kara