Ha, love it! There aren't many cities where you can see so many people actually having fun on their commute, huh? (cf. Odakyu-sen, etc) 'Course, if they tried something like this in Tokyo, the bike lanes would be instantly blocked by combini delivery trucks and taxis, and the mama-chari's would STILL be on the sidewalk, barging into pedastrians and each other at 4 mph.
(Incidentally, what's that strange white vehicle that passes by near the end of the clip. It looks like a slow moving chip van, but with the driver on the outside?)