Happy to inform that the OTA has contacted me sooner than I thought. The only thing is that they offer me a "interesting" new route. Looks like they want to stick to the booked airport in Tokyo. They offer me a flight Nuremberg - Frankfurt, 4:15 waiting, next to Osaka, 5:30h waiting with airport change and finally to Narita.
Answered that ANA has informed me about an other route, also via Frankfurt but with only 2:35 waiting and next to Haneda. As ANA offered this option, should be no problem to get for the OTA. I don't mind arriving in Haneda.