"Tsuki" (Japanese: 突き;, "TSUKI") is a song recorded by Japanese singer Namie Amuro for her ballad-inspired concept compilation, Ballada (2014). It was distributed by Avex Trax and Amuro's record label, Dimension Point, on January 29, 2014 in Japan, and released worldwide as a digital single by Avex Music Creative Inc. The physical and digital formats included the two B-side tracks "Neonlight Lipstick" and "Ballerina", which later served as promotional singles online. "Tsuki" was written by Tiger, whilst production was handled by Hiro Doi and Zetton. Musically, the single is a J-Pop ballad with instrumentation consisting of synthesizers, bells, and chimes.

Upon its release, "Tsuki" received favorable reviews from music critics. The majority of them complimented the composition, alongside praising Amuro's vocal performance and overall production. Commercially, the single experienced success in Japan, reaching number three on the Oricon Singles Chart and on the Japan Hot 100 chart. It was certified Platinum by the Recording Industry Association of Japan (RIAJ) for digital sales of 250,000 units. An accompanying music video for "Tsuki" shot by Naokazu Mitsuishi in Iceland, and features Amuro in a vast field of snow, ice, and grass. To promote the single, it was used for the 2014 film Dakishimetai: Shinjitsu no Monogatari and was performed on the singer's 2013 Feel tour and 2014 Live Style concert venue.

On January 15, 2014, Japanese music media website Jame-World confirmed the release of Amuro's single "Tsuki" for January 29, 2014. When premiering the recording, the singer confirmed on her website that the tracks "Neonlight Lipstick" and "Ballerina", both of which were digitally released prior to "Tsuki", would appear as the single's B-sides; the former song was used as the commercial single for Japanese cosmetic company Kosee, whilst the latter was a collaboration with Gucci and Vogue Japan. The tracks have also been released through iTunes Store on October 16 and October 23, 2016, respectively. "Tsuki" was written by Japanese artist Tiger, while production was handled by Hiro Doi and Zetton. The recording was distributed by Avex Trax and Amuro's record label, Dimension Point, on January 29, 2014 in Japan, and released worldwide as a digital single by Avex Music Creative Inc. While the CD single features the title track, "Neon Lipstick", "Ballerina" and their respective instrumentals, the DVD single additionally incorporates their visuals. A digitally released extended play features all the six songs from the physical formats. The accompanying cover artwork—portraying Amuro inside a room full of shiny fabric and her wearing a long wedding dress—was shot by Japanese photographer Kazutaka Nakamura; it acts as an outtake of the singer's photoshoot for Japanese magazine Sweet.

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