"Uchōten" (有頂天) "ecstasy", is a single by Japanese rock duo B'z.

The song debuted in number one on the weekly Oricon Singles Chart, with 133,980 copies.

[3] In addition, the song reached number one on the Billboard Japan Hot 100 and the Top Singles Sales chart.

[4][5] It was ranked #37 at Oricon's 2015 year-end chart[6] and #39 at Billboard Japan's.

[7] The Recording Industry Association of Japan certified the single Gold for its sales of 100,000 copies.