I think it's fraudulent. Clues:
* the web site has no Japanese version
* the address is for a mall, not a specific location
* the phone number is for the "food vendor area" for a Shiraken store in Sendai
* Shipping returns/page refers to some other online-only site ([email protected])
I always feel bad when a member comes to check on the wonderful WWII Japanese war flag they paid big money for and we have to tell them it's fake. We recently had several people in India receive job offers from a fake Japanese company they had applied to and had to disappoint them. At least you were smart and checked. Take care and stay healthy.