Okay, you're addicted and you want to buy these cute products! Here is a list of my favorite spots for acquiring all things San-X!
6–1 Jingu-mae, Shibuya-ku, Tokyo
If you are fortunate to ever be in Japan, definitely put KiddyLand on your list of places to visit. I visited KiddyLand in Harajuku almost once every two weeks. They always had new San-X products of the newest characters on an almost entire floor just dedicated to San-X.
Haruhinkan Toy Park
8–8–11 Ginza, Chuo-ku, Tokyo
While it's supposively the biggest toy store in Tokyo, I wasn't very impressed. The selection of San-X products is minimal compared to KiddyLand. However, they had an ample amount of fluffy cute things.
5413-A & 5413-B Walnut St., Shadyside, Pittsburgh, PA 15232
My favorite San-X store in the US. They get new character products quickly from Japan and are always updating their stock. I've ordered from them online and it was fabulous. Sometimes they have special deals where you get a free gift. I've never visted their store, but I've also shopped at their booth at anime conventions, such as Otakon, and they are always friendly.
3222 M Street, NW, Washington, DC 20007
If you are shopping in Georgetown, you may want to stop in the little cute store on the basement floor. The owners are Koreans and also very sweet. I love stopping in here to see what treasures I might find. They have a lot of old character products, but watch out for "fake" ones! Just be sure to check if the San-X logo is present and the character names are spelled correctly.
1073 Avenue of the Americas, New York, NY 10018
Unlike the Kinokuniya Bookstore in Tokyo, this one has a huge selection of San-X products including stationary, plushies, bags, and more. I always try to stop in here when I'm in NY.
4720 South State Rd., Ann Arbor, MI 48108
Recently, I've been a little disappointed with their stock. They don't seem to have as much as they used to. However, I have seen products featuring retired characters pop up from time to time so it's always worth a check. They also attend conventions, such as Katsucon and Otakon, however, I've never visited their store.
Springfield Mall, Springfield, VA 22150
I haven't been to Fan Club in years since it used to be at Lakeforest Mall and Tysons Corner and Montgomery Mall as kiosks. The owners were Korean and I assume it is the same here. The store had a wide variety of character merchandise, particularly San-X, Sanrio, and some Korean characters.
Always a good place to look for various San-X products. I admit I've had way too much fun here, especially for Cheese Family plushies.