The Japanese ones are strictly intended as emergency lights - the only way to turn it off is to put it back in the holder, and they use alkaline batteries, not rechargeables. I don't believe the batteries can be replaced, either.
Intended more or less as a throw away emergency item which can be replaced relatively cheaply - I can't see anyone fitting out a hotel with one of those fancy rechargeable lights in every guest room...
They're also all incandescent - I've never seen LED ones, but I guess they'll come out eventually.
The top one (orange body) apparently has an approx. 4 hour runtime, uses 2 C cells, 1000lux brightness, and uses a 2.5V .75A lamp
The bottom one (white body) has an approx. 2 hour runtime, uses 2 AA cells, 20lux brightness, and uses a 2.2V .25A lamp.
Graham