[mistermann]

I suspect there are fulfillment companies that you could inventory with who would have the required volumes per country.....if you weren't doing custom orders (every package is the same each month, or only a few variations) this could work very well. I'd say the revenues are enough that you could even hire a locally based person to do some part time quality control.

[Scoundreller]

Or possibly the Japanese manufacturers/distributors could send the whole batch to some low(er)-cost locale for P&P. It's hard to say whether they'd be more or less amenable to exporting their wares.