Perhaps JTM can educate me a bit more on the long-running TV series "The Hangman" since he's always been into the Japanese police dramas. However, from what I've read and seen, the show began in 1980 on TV Asahi with the premise of a secret organization of vigilante killers who give their brand of permanent justice to those evildoers who manage to slip through the fingers of the law.
Well, the title is familiar to me because some years ago, a rollicking reggae cover of the kayo kyoku "Arigata ya Bushi"(有難や節)by KAJA was performed as the ending theme for the fourth season of "The Hangman". Other than that, I haven't had much contact with the show.
Back in early December, I first mentioned the name of Tomoharu Taki(滝ともはる)and his "Taxi Driver" from 1978. Well, the singer-songwriter was involved with the second season of "The Hangman" by providing the ending theme for that one. "Midnight Flyer" was actually written and composed by Australian singer-songwriter Paul O'Gorman (along with Steve Groves) with Taki coming up with the Japanese lyrics, and it's so coolly West Coast AOR that Taki may have sprouted a mullet and a skinny tie just by recording it. I don't know whether O'Gorman himself had sung and recorded "Midnight Flyer" but I couldn't find any such evidence on YouTube.
PS: Actually, there is one more song that I covered that has an association with the series.