4:00 A.M.

Ohnuki wrote the words and music, and Sakamoto arranged and played keyboards. Credits from the reissue metadata and Japanese Wikipedia list Haruomi Hosono on bass, Motoya Hamaguchi on percussion, Tsunehide Matsuki on guitar, Yuichi Togashiki on drums and a horn section and backing vocalists including Kayoko Iju, Hiroko Suzuki, Natsuko Wada, Tatsushi Umegaki and Hide Kotaro. We found no interview in which she discusses it, and no recording date or studio. English Wikipedia calls it her most popular song, with over 147 million Spotify streams as of May 2026; a weakly sourced page says it was never a major hit on release and resurged in the 2010s through YouTube recommendations and the city pop revival, and she said she was surprised at its popularity on social media.

Setlist.fm shows it played seven times, well below "Atarashii Shirts" and "Totsuzen no Okurimono" at 37 each. The 7-inch re-edit came out on August 2, 2025. WhoSampled, which we could not open, reportedly lists it sampled in more than 20 songs and covered by Caitlin Myers with Un3h and Will Stetson in 2022, and the band Street Sensation covered it. Our upload is the 1978 album recording.