Hi Jan,
We do advise to customers that Japanese cuisine is predominantly seafood based.
However, we have spoken to our local agent in Japan and they've said that as long as they know beforehand, they will ensure there are alternative meals available that contain no fish or meat.
If you would like to book a place on the trip, please let our Holiday Advisers know your dietary requirements, so we can make sure to put a note on your booking and inform our agent.
Regarding medication, most are fine, but Japan does have some restrictions. We advise that you check with the Embassy and the FCO directly regarding your specific medication.
I hope this helps!
Many thanks,
Vickie