Hi Deaf, I would suggest an S/Pdif on Coaxial if you have the ability to connect that way.A digital co-ax would be highly preferable to the Toslink. I use a Harmonic Tech Platinum digital cable that seems to be a good connection as an example of a co-ax connect. In regards to speaker/ic cables, I really like the Nordost line. As you can see, I am now using their Red Dawn Rev2 speaker cables and I am impressed by these.
I do think that the line below Red Dawn is too bright though, so you may want to start at Red Dawn or above. I'm not sure what is commonly available in Japan, if the Nordost is not, then I would suggest looking at the Furutech cables. BTW, I don't really understand why you cannot order gear off the web? Certainly cables are pretty easy to order online...I'm also fairly sure that ARC will be happy to sell you a piece if you don't have a local dealer, or at least refer you to a dealer in Japan. ( I would think there is one).
I do think that the line below Red Dawn is too bright though, so you may want to start at Red Dawn or above. I'm not sure what is commonly available in Japan, if the Nordost is not, then I would suggest looking at the Furutech cables. BTW, I don't really understand why you cannot order gear off the web? Certainly cables are pretty easy to order online...I'm also fairly sure that ARC will be happy to sell you a piece if you don't have a local dealer, or at least refer you to a dealer in Japan. ( I would think there is one).