Just like Teppei Shibuya's（渋谷哲平）"Deep", Katsuko Kanai's（金井克子）"Tanin no Kankei" (Relationship with the Other Woman) was a kayo kyoku that I'd found out about through the comic duo, Tunnels, on their Thursday night show. The guys always loved to take a poke at some of the old songs especially if the singer had a rather distinctive set of choreographic moves, and Kanai was definitely one beloved target.
"Tanin no Kankei" is a kayo classic partially because of the opening "pa pa paya pa" scat and Kanai's right-hand signalling. I think when it comes to the 70s stuff, that performance puts it on a par with any of the Pink Lady hits in terms of instant recognition. And considering that it was from the early 70s, the conspiratorial jazzy music by Makoto Kawaguchi（川口真）makes "Tanin no Kankei" sound like something from a decade before. Mieko Arima's （有馬三恵子）lyrics about a woman stating her relationship with a guy who makes two-timing a regular hobby evokes a lot of images of seedy lounges and bars.