I've just started a very simple online store that caters to the small, but growing, geocaching community in Japan. My new web site is called Cache Kuni!.
I'm selling geocaching related products, such as nano caches, official geocaching.com containers, and geocoins and Travel Bugs. I'm also trying to create a community by hosting an online forum section on my web site where hopefully geocachers from all over Japan will join to discuss the hobby.
It's a very small business right now, but here's hoping it takes off!
PS And for my Japanese readers: