"Summer Trip" is the fifty-fifth single by singer-songwriter Koda Kumi and is her first summer single in nearly two years. The single was a double a-side and contained one b-side. It debuted at #7 on Oricon Daily, losing out to CNBLUE's "lady" and DAIGO's "Itsumo Dakishimete/Mugen∞REBIRTH."

The single's music videos and artwork were shot in California, with the cover and booklet art being taken in Malibu. The video for "Touch Down" was filmed in Los Angeles, while "LALALALALA" was filmed at Venice Beach. Both videos were produced by famed videographer Fatima Robinson.

Summer Trip is Japanese artist Koda Kumi's fifty-fifth single under the Avex sub-label Rhythm Zone. The single charted at #7 on the Oricon Singles Charts, coming in behind CNBLUE's "lady" single and DAIGO's "Itsumo Dakishimete/Mugen∞Rebirth" for a spot in the top five. However, it jumped to take #5 on the second day and took #6 on the weekly charts. The single became her first summer single since 2011's 4 Times.

Summer Trip contains two a-sides, "Touch Down" and "LALALALALA." "Touch Down" is a hip-hop track written by famous music producer Toby Gad, who is best well known for his works with John Legend, Fergie and Beyoncé. The song was originally produced by Toby for American singer-songwriter JoJo, and was intended to be for her then-titled 2012 album Jumping Trains. The singer had recorded the song under the name "Touch Down (Flippers Up)"; however, it was never released. Instead, Avex picked up the song rights and it was passed to Kumi, who then modified the lyrics for a Japan release. Summer Trip's other a-side, "LALALALALA," was more upbeat, carrying elements of pop and rock. The song was written by Swedish writers Figge Brostrom and Anna Engh.

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