I'd always wondered where the band got its name. The first leader of the band, guitarist Takehiko Kogure（小暮武彦）, revealed that "Rebecca"came from Kate Douglas Wiggin's "Rebecca of Sunnybook Farm"(according to J-Wiki)....not sure if he had been a fan of hers. Another interesting piece of trivia I got was that he and lead vocalist NOKKO had actually gone to America before the band got started in 1984 to try their luck there, but didn't quite succeed so they returned.
My first sighting of the band was on one of the music ranking shows, and they did a live remote appearance of one of their hits, "Monotone Boy"(so probably around 1987). I'll be honest with you...NOKKO's vocals were off, and the song was meant to be fairly screamed out, so I wasn't too impressed. I just thought "NEXT!"
Written by NOKKO and composed by Rebecca keyboardist Akio Dobashi（土橋安騎夫）, "Friends" also happened to be the theme songs for two different TV dramas, "Half-Potato na Oretachi"（ハーフポテトな俺たち....Us Half-Potatoes) in 1985 and "Lipstick" in 1999, both programs about growing up as teens. I saw a few episodes of the latter show, and the reappearance of the Rebecca classic got people remembering and probably singing it in the karaoke boxes. In its original release, the song got as high as No. 3. It was also a track on Rebecca's 4th album, "REBECCA IV -- Maybe Tomorrow"(November 1985) which hit the top spot on Oricon and became the 3rd-ranking album for 1986.
Still not sure about "Monotone Boy", but "Friends"...and "Lonely Butterfly" are some of my late 80s touchstones.