I've been using google adsense for my Japanese language sites, which work fine. There's enough of an ad inventory to pull up relevant ads in Japanese.

I understand that yahoo.co.jp has much larger share of the market than google in Japan, so maybe this would be a better choice for my sites.

Does anyone know if I have to set the 'market' to Japanese before Japanese ads will display?

At the moment the ads seem to be all in English!

If anyone has any examples of YPN ads in Japanese, please stickymail me with the URL. I haven't found any myself.

Thanks