Can I get a Japanese keyboard on amazon or eBay or I can't buy a Japanese keyboard in the us?
Of course you can get them in the us. You just have to know where to get them. i have found some on amazon - http://www.amazon.com/s/ref=nb_sb_ss_i_0_17?url=search-alias%3Daps&field-keywords=japanese%20keyboard&sprefix=japanese+keyboard%2Caps%2C1871&rh=i%3Aaps%2Ck%3Ajapanese%20keyboard
probably not Amazon, but you can on Ebay