Shamisen to ootobai
I think the policemen ride two different types of bike.
Fort de notre savoir, nous pouvons maintenant affirmer que c'est une Honda Dream CA77.
With rather hideous auto adjust colors and sharpening: Notice what seems to be a 2-in-1 exhaust. It must be a Triumph. Probably a 6T Thunderbird, with a "scrambler touch". Correction: it is a Triumph. Still searching for the model, though. I'm now almost sure it's a Triumph TR6 Trophy. Still looking for the date and the sub-type. A TR6/B Trophy, very likely
Triumph is sure. TR6/B Trophy is probable.