I posted this a long time ago in the roadie forum but here it is again.
Making of Bicycle 自転車が出来るまで

From welding frame "pipes" all the the way to paint job and assembly, mostly done by giant robots (like everything in Japan).

I just now noticed that the commuter/cruiser shown in the first minute has track ends. It's probably a single-speed+coaster brake, but still it has fixie potential