I get asked very frequently from people living in the US where to buy Spitz music so I decided to just post my answer here:

There are two sites that I know of for sure that carry Spitz CD's. One that I've used myself and one that I have not.

http://www.cdjapan.co.jp/ (I've used this site several times with no complaints)

www.yesasia.com (Which I have not used)

If you are lucky enough to live in or near L.A., N.Y., or Hawaii there is an even better option.

Each of those cities has a great store called "Book-off". Its a huge chain in Japan but only has those few locations here in the States. They specialize in used Books, CD's and DVD's from Japan. I was actually fortunate enough to find this store by accident while visiting friends in family in L.A. just this summer... and I bought all 12 regular Spitz CD's (Sazanami wasn't out yet). Even better I got them all for an average of 7 to 10 dollars each because they we're used.

-JK