"Sora ga Natteiru" (空が鳴っている, "The Sky Is Ringing"), also known by its English name "The Reverberation", is one of the A-sides of the single "Sora ga Natteiru/Onna no Ko wa Dare Demo" by Japanese rock band Tokyo Jihen, led by musician Ringo Sheena. The song was the band's fourth to be used in a commercial campaign for Ezaki Glico's Watering Kissmint brand of gum. It was released digitally in February 2011, and eventually physically on May 11, 2011, after the three-month postponement of the physical edition.

In July 2010, Tokyo Jihen released two digital singles: "Tengoku e Yōkoso", the theme song for the drama Atami no Sōsakan, and "Dopa-mint!", Tokyo Jihen's third song used Ezaki Glico's Watering Kissmint range of gum. The band performed at the EMI Rocks festival on November 6, 2010, celebrating 50 years of the EMI label.

The band produced the single "Oishii Kisetsu" / "Ketteiteki Sanpunkan" for entertainer Chiaki Kuriyama, which was released on March 2, 2011. After the 2011 Tōhoku earthquake and tsunami occurred on March 11, the band released a cover of Tokiko Iwatani's 1964 song "Yoake no Uta" to YouTube.

The single was first announced on December 10, 2010, with a preliminary release date of February 23, 2011.

The music for the song was written by Seiji Kameda, an infrequent songwriter for the band. Kameda wrote the tracks "Superstar" and "Tōmei Ningen" from Adult, and most notably the digital single "Senkō Shōjo" (2007), which was commercially successful enough to be certified gold by the RIAJ twice. Kameda considered the songs he had written for the band as all "bright", so wanted to attempt to make sad or dark songs. The song was originally called "Breast" in the demo stage. When deciding which song was the best for the commercial, the band unanimously picked Kameda's composition, as they wanted to try something different from the songs previously featured in the campaign.

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