We have contacted with Sony Marketing in Japan for XS-GS6920.
But unfortunately, they don’t provide the foreign type of this item.
The type of the items are only domestic version(inly usable in Japan).
So I recommend you to search the Sony Marketing in Thai-land on the web site.
Or if STT doesn’t mind to purchase the Japanese type, check the web site (Sony Marketing in Japan)
I attached as bellow .
http://store.sony.jp/index_b.html?s_tnt=62997:1:0
If you find the item in particular STT wants, please let me know!