Seiko Sato -- Kono Koi ga Subete（この恋がすべて）

 

Wow! The more you know, eh? All these years and I hadn't known that comedians Tsutomu Sekine（関根勤） and Kazuki Kosakai（小堺一機）had actually been a comedic duo. Of course, I knew them individually: Sekine has been a mainstay tarento on a ton of variety shows as well as a celebrity impressionist. Kosakai is someone I knew who had that long-running talk show on Fuji-TV during weekday afternoons. But apparently since 1981, the two of them were known as the duo Kosakin（コサキン）.

The two also had their own radio show "Kosakin de WOW!"（コサキンDEワァオ!）for about 28 years between 1981 and 2009 (with specials about once a year starting from 2020). They even had their own brief late-night variety show "Kosakinruu no Okonnaide, Kiite!!"（コサキンルーの怒んないで聞いて!!...Kosakinruu, Don't Get Angry, Just Listen!!）from 1993 to 1994.

The ending theme for that show was Seiko Sato's（佐藤聖子）"Kono Koi ga Subete" (All This Love) which can be found on her January 1994 album "Marvelous Act". Written by Yui Nishiwaki（西脇唯）and composed by Sato herself, it's quite the upbeat song for a late-night show that approaches 90s City Pop. I'd also think that it could have been fine adorning some prime-time show as well.