For those who are really in the know when it comes to Japanese television, this song and the way that it's been delivered in that scat should be instantly familiar to you. The reason is that it's at least a partial cover of the theme song for "11 PM", the long-running late-night variety show on NTV that often had that slightly risque bent to it.
And indeed, it's Keitaro Miho（三保敬太郎）who composed the original theme, and once again he's behind this version which has lyrics this time by Hiroshi Hoshino（星野博志）. With the title "Oui Savadava", the new arrangement has got some more Latin spice added to the scat, and the performers are a vocal trio known as Alan Dolon（あらんどろん）, which is a slight deviation from the famous French actor, Alain Delon, who's practically a legend in Japan. Try as I might, I couldn't track down who the three singers were. If anyone does know, please let me know. As well, I was seeing quite a few years being listed as the release date for "Oui Savadava", but the liner sheet with the original 45" states that it is 1980.
Enjoy your cocktails with this one!