I'm not sure why most of your fiat claim was rejected while all of your BTC claim was accepted. Hopefully the trustee will provide a convenient way to dispute rejected amounts, but for now the method outlined in my post above (coming from the Tokyo District Court) is all we know. The amount accepted does not indicate the amount you will get back - I'm pretty sure you will only get a fraction of the accepted amount back (your share of the remaining funds).
Thanks for the headsup on the point of how much to be returned.
In my eyes it was not really usefull to recalculate every currency into yen just to not use it at the end because everyone will be paid only what is left on the individual currency.
I think that nearly no Euro are there anymore was because MtGox had withdraw problems on Euro for weeks and months before. Which was one reason why the bitcoin price was so high there. So no euros on their bank accounts might be the problem of high rejection.