The song underwent a few title changes before settling on the final, and arguably more mundane, one of "Doyoubi no Koibito". Initially, Yamashita had something of the Mardi Gras in mind when he got down to work on the song, so "Eien no Mardi Gras" （永遠のマルディグラ...Mardi Gras Forever）was the original title. It then became "Kayoubi no Mardi Gras" （火曜日のマルディグラ...Tuesday Mardi Gras）and "Doyoubi no Ame no Uta" （土曜日の雨の歌...Saturday Rainy Day）before the singer finally chose on the side of the weekend and made one final name change (Thanks, J-Wiki).
"Doyoubi no Koibito" got as high as No. 22 on the Oricon weeklies. It was also a track on Yamashita's 8th album, "Pocket Music" which hit the top spot soon after its release in April 1986.
|Saturday in Shibuya|