Why would it be a problem? right now yen is ~1:100 of the dollar, so I presume movie ticket cost 1000-2000 yen, so btc 0.025 ($10)=25000 XBT would be no problem.
people will just say "thou"-in your last example-25 thou or 25k bits
OK, the last example didn't really made my point, whether it's XBT25000 or XBT0.025 it shouldn't be too hard to comprehend for anyone.
My point was, too many digits will cause confusion, whether it's right or left side of decimal.
You idea offers some improvement, as it's slightly easier to deal with larger numbers than smaller fractions, but it would only work if we assume that everyone will instantly and happily switch to the new system. But we know that's not gonna happen.
So if we were to go that route, we would divide in 2 groups, one using the old (current) system and other -the new one. Total chaos.
So, as I said before, I do see your point, but it will likely do more bad than good.