Buying used equipment in Japan

Hello,

I may move to Osaka in the next few months and I am very curious about the audio market in Japan. I know that it exists, but where? Here on Audiogon? How can I find specifically Japan-located sellers? I was thinking about lugging tube amp over there, but of course that is silly if I can find the same with correct voltage over there. Unless of course it would be cost effective? Where does the buying and selling of used equipment take place? Is there a Japan-specific online market? In English?

Thanks for your help. In my last overseas post, I was completely without music and I am determined not to repeat that mistake.