Hey, I have similar idea. However, I don't think PJT will be able to make arrangement for us to meet the singers.
If there are 7 days for a tour like this:
Flight to Japan, if there're still time, rest at hotel.
Sightseeing around Tokyo: temple, shopping districts...
Manga/Anime relate activities: cosplay cafe, manga street...
The singer's fanclubs: instroduce, memberships, mini live concert of singers (For this PJT has to search and reserve seats)...
Day 5 and 6:
Free style: you have your own place that you want to go and your own things to do. You can ask JPT for assistance with extra fee (I want to go to hot spring and local festival).
That is a general idea, will JPT be able to create this tour?
Alway Keep the Faiths