It probably doesn't appeal to the domestic market maybe, remember Japan is all Anme rather than cartoon network 🙂
You have to ask not only the time/effort it takes to do that, but also the cost of those huge one-off vinyl's, just imagine if one gets torn/wrinkled during the operation, it would be a major problem!
But overall its pretty cool, although I'm not sure I would want one, it seems a bit wishy-washy colours, not enough 'punch' for my liking. Now when are we going to get a transformers wrapped Shinkansen or dare I say it even a Power Rangers one 🙂