In the case of the US, you can improve this further:

Find a friend who lives near a Mitsuwa, JAS Mart, or similar Japanese grocery (there are several here in NYC).

Have him buy the candy there in bulk (enough to fill all the US-bound orders anyway), and use the relatively cheap USPS flat-rate shipping to send it to US subscribers.

i.e., avoid buying in Japan (which is more expensive b/c of VAT) and avoid shipping from Japan; the chain groceries have done the hard work for you, so you can reap the benefits.