""It is claimed that VIP Style came to be due to the risk of gangsters riding around in high-profile European sedans like the Mercedes S-Class or BMW M-Class."""

http://en.wikipedia.org/wiki/Bippu

I wasnt that off.. I guess.. I know wikipedia sucks at times.. But I will take it as pretty close to my guess.

sounds to me, japanese people just made it a little different and add it there own twist to it.