Agree with you one of the busiest cities , I heard that was also one of the most expensive wasn't it? You had a great trip 300 euros round trip flight is not that expensive for approximately 12 hours route. One day I have to visit Eastern Asia as well.
It wasn't cheap but compared to Iceland, for example, is it okay. The prices were the same as visiting any other megapolis in Europe or US. The good thing is that you have a choice in the big cities and you can choose cheap like I did ;)
Also I heard that Iceland is very expensive. If you said that it was ok compared to Iceland I believe you and I have a better idea about Tokyo Thanks and enjoy your future trips !!! :) :)