On October 31, 2022, at their show Nogizaka Under Construction, Nogizaka46 announced their thirty-first single, scheduled for release on December 7 on four limited CD+Blu-ray, a regular CD, and special digital extended play.

[3] Front and back cover artworks for all physical editions of "Koko ni wa Nai Mono", taken by Toshiaki Kitaoka, was revealed on November 9, expressing multiple exposure that superimposes the members and various events related to Saitō.

[4] All Blu-rays included the group's performances at Midsummer National Tour 2022, which was held between August 29 and 31 at Meiji Jingu Stadium, Tokyo.

[5] An accompanying music video for "Koko ni wa Nai Mono" was uploaded via Nogizaka46's official YouTube channel on November 19, 2022.

[6] The choreography scene was filmed on the rooftop of building in Roppongi Hills, while Saitō's solo part was on Tokyo Metro Ginza Line Shibuya Station's platform.

Shot at a school in Ibaraki, the music video is directed by Mitsunori Yokobori, showing the members trying to restart the clock that has stopped at 5:17 with gears containing their own thoughts.

[13] "Koko ni wa Nai Mono" entered Billboard Japan Hot 100 at number two in the chart issue dated December 14, 2022, behind only Official Hige Dandism's "Subtitle".

[17] "Koko ni wa Nai Mono" was certified million for physical shipments by Recording Industry Association of Japan (RIAJ) on February 10; the first in three years since the 25th single "Shiawase no Hogoshoku".

[18] On November 4, 2022, Nogizaka46 gave the debut performance of "Koko ni wa Nai Mono" through their YouTube channel Nogizaka Streaming Now.