Diorama is the first album by Japanese musician Kenshi Yonezu, which was released on May 16, 2012. It was the first studio album released under his real name, and the first to use his own voice as opposed to his Vocaloid albums released under the name Hachi. The album was one of the top independent releases in Japan in 2012, and was one of the winners of the 5th CD Shop Awards.

Yonezu first released music on the Internet using Vocaloid software, and uploaded videos to the video steaming website Nico Nico Douga from 2009 until 2011. Many of his songs were very popular on the site, including "Matryoshka" with 5,000,000 views and "Musunde Hiraite Rasetsu to Mukuro" with 3,000,000 views amassed by the release of Diorama. In 2010. Yonezu self-released two albums of Vocaloid songs, Hanataba to Suisō in February and Official Orange in November. Official Orange also featured a song where Yonezu used his own vocals, "Yūen Shigai (遊園市街^?, "Amusement City Streets").

In April 2010, Yonezu joined the dōjin animation collective Minakata Kenkyūjo (南方研究所^?, "Minakata Laboratory"), a group that he'd worked with since his "Clock Lock Works" video in November 2009. The group had worked on Yonezu's songs "Clock Lock Works," "World's End Umbrella," "Sajō no Yumekui Shōjo" (沙上の夢喰い少女^?, "Dream-eater Girl on the Sand") and "Wonderland to Hitsuji no Uta" (ワンダーランドと羊の歌^?, "Wonderland and the Sheep's Song").

...
Wikipedia