Adult (大人（アダルト）^?), a.k.a. Otona is the second studio album by Japanese alternative rock band Tokyo Jihen, released on January 25, 2006 in Japan through Toshiba EMI/ Virgin Music. The album was produced by the band and Japanese recording engineer Uni Inoue. The album reached number one on the Oricon Weekly Album Chart on February 6, 2006.

Adult marked the debut for guitarist Ukigumo and keyboardist Ichiyō Izawa, who joined Tokyo Jihen after the departure of previous members Mikio Hirama and H Zett M (Masayuki Hiizumi). Ringo Sheena, Ichiyō Izawa and Ukigumo played a key role in this album and arranged songs while arguing. About Shuraba, Sheena arranged the single version mainly, but, obeying Sheena’s wishes of not wanting to record the single version on the album as it is, Sheena, Izawa and Ukigumo re-arranged it based on the latter's proposal.

In 2008, "Keshō Naoshi" was covered in Portuguese by on her first album Pluma, and in concert by , the recording of which was featured on his 40th anniversary album 40nen. Mada Kore ga Best de wa Nai..

All lyrics written by Ringo Sheena; all music composed by Ringo Sheena and arranged by Tokyo Jihen, except where noted.

All official European language titles according to Ringo Sheena's website.

Tokyo Jihen

Additional personnel

Guest musicians

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