Wwowww... Nice. Judging from the headbadge, it's what- a '74, '75?

Btw, is that the original handlebar? I dunno if any of you have ever noticed, but it's always seemed to me that a lot of these older Japanese bikes from the '70s used a narrower diameter tubing for the HBs.... I don't have that much direct experience with them, but is that really the case, or is it maybe just an optical illusion?