Coupling Songs: 'Side B' is a compilation album by Japanese musical unit Superfly. Released on December 2, 2015, the album was packaged as a 2-CD set with Superfly's single "Kuroi Shizuku", and compiles Superfly's original B-sides released between 2007 and 2014.

Superfly debuted as a musical group in 2007, with the single "Hello Hello". Originally a two-member group consisting of vocalist Shiho Ochi and guitarist/producer Kōichi Tabo, until the band's third single "I Spy I Spy" (2007), when Tabo withdrew from the band's line-up to act as a behind-the-scenes member of the project. In 2008, Superfly gained national recognition with the song "Ai o Komete Hanataba o" (2008). Used as the drama Edison no Haha's theme song, the song was a great commercial success, certified for one million paid downloads in 2014 by the Recording Industry Association of Japan. In 2010, Superfly released "Wildflower" & Cover Songs: Complete Best 'Track 3', a two-CD compilation to commemorate the band's 10th physically released single. The collection featured a four-track original single lead by the song "Wildflower", used as a theme song for the Fuji TV drama Gold, as well as a compilation of all of the B-sides of Western cover songs Superfly had released between 2007 and 2009. The two-CD set was a commercial success, debuting at number one on Oricon's weekly albums chart, and receiving a Platinum certification.

In May 2015, the fifth original album by Superfly was released, White. Taking a year to write, the album was partially recorded in Los Angeles, when vocalist Shiho Ochi traveled there to collaborate with Chris Cester, the former lead singer of Australian Jet. Superfly worked together with American songwriters Jason Hill and Bonnie McKee, as well as Japanese singer-songwriter Bonnie Pink and the poet Bin Sugawara. The album was promoted primarily with the song "Beautiful", which Ochi wrote for the Mother Game: Kanojo-tachi no Kaikyū. Released digitally on May 8, the song was a commercial success, certified Platinum by the Recording Industry Association of Japan. From July 4 to December 14, Superfly performed a 39 date tour of Japan, entitled the White Tour. Part way through the tour, Superfly released McKee's contribution to the album "On Your Side" as a post-album single, featuring two compositions recorded for White that did not make the album's final cut.

...
Wikipedia