I’ve been trying to think where on earth I’ve heard the Adult Swim version of the blue jacket opening theme for a couple of weeks now, and it finally occurred to me.

The track is actually part of Papik’s Italian soundtrack, but as far as I’m aware, it wasn’t used during the actual Italian series (instead, the Italian dub got the critically acclaimed Moreno song for its opening). The US opening theme itself is included on the OST release for the Italian dub though, and is simply titled “Lupin theme”. I would guess that this was composed by Papik to be used as the opening theme on a home video release, or if Moreno’s track fell through.

There’s a lyrical version of said theme on the OST too. You can hear a snippet of that during the first track here. Who knows if this will actually show up sometime during the US dub?