If you've ever walked around Osaka, you'll see taxis parked right up against the cross walks with their doors open.
At first when I witnessed it I was kind of stunned, but have gotten used to seeing them.
Coming from the States, I figured that when one wanted to take a taxi, one would jump in the one farthest from the cross walk, because that taxi was first in line.
Well, in Osaka, you jump in the one closest to the cross walk.
The taxi that is in front of the taxi you jumped into would then back-up and wait for the next customer.
No stress to walk all the way to the front of the line of taxis, since in Osaka "time is money".
Only thing I don't like about taxis in general here in Japan is that they wait for customers with their engines idling.
If Japan really wants to cut down CO2 emissions, I think they may need to look here first.