A mystery for me...and for anyone who reads this. I came across this album, "Love Trip" (1982) through the auspices of "Japanese City Pop". Furthermore, I found just one song by Takako Mamiya （間宮貴子） on YouTube, and I'm not even sure if it's been uploaded in its entirety. "Mayonaka no Joke"(真夜中のジョーク...Midnight Joke) is a pretty decent City Pop tune. But despite looking throughout the Net, I haven't been able to find any more information about this singer. Would like to track it down someday, but I've got a feeling that this could be one of the rarest of the rare. (April 15, 2017: Obviously since my original comments, things have improved on this front...as long as the powers-that-be don't take it down. And I hope they don't. I still consider the album a very rare find.)
"Mayonaka no Joke" was written by lyricist Ichiko Takehana（竹花いち子）and composed by Hiroyuki Nanba（難波弘之）. Takehana apparently has her own foodie blog.