As your all probably aware you can park Japanese, Chinese and Korean IDN at
www.sedo.cn.
Problem we have all been encountering is Keywords. Most seem to get rejected.
I think the answer is that the interface won't accept any keywords for which there is no Adword subscription.
To find out which keywords are valid, go to
www.google.jp or www. google.cn and try search terms until you see Adwords posting at side of main listing. You then have a valid term.
Japanese terms seems to be accepted for all Chinese and Japanese domains, but specific Simplified Chinese characters are not accepted by Japanese.
Japanese Google seems to be much better populated than it counterparts with Ads at the moment, and as much Kangi is common to all these languages, I would suggest that is best place to start.
With English Keywords you are often blocked if the relevence is poor. This seems to be less of an issue on
www.sedo.cn and once you get a yellow, it is highly likely that your keyword will be accepted, as I don't think the scrutineers have any idea what they are looking at the moment. Seem to be mainly German and French from what I can see.
Best Regards
Dave Wrixon