I wonder what the dyno would be on those... that seems like some pretty low boost...
Actually, in Japan, they measure boost pressure in Bar (barometric pressure) While here in the states, we measure it in PSI (or Pounds per square inch).
I don't remember the conversion formula off the top of my head, but if you did the calculatiuons, you would notice the Boost levels are comparable to most domestic kits.
Actually, most tuners are measuring boost in PSI these days, because going by atmospheric pressure readings isn't as acurate or subtle. Measuring in PSI is more precise, and allows you to dial in your turbo in a more reliable fashion. Bar is measured in much smaller increments (normally don't see a turbo measurte more than 2 BAR (and that's a LOT of boost).
Metric is a good system, but the imperial system still is better for some things, boost measurement being one of them)