Upvote:1
The Mumbai consulate has instructions that aren't as clear as the ones provided here by the Embassy of Japan:
SHORT-TERM VISA (A stay of up to 90 days for tourism, business, attending conference, visiting friends, etc., that does not include paid activities.)
(1) TOURIST VISA - Required Documents
Self-arranged visit
1.Application with Photo;
2.Passport;
3.Travel Booking (Travel itinerary and Hotel Booking);
4.Document to prove ability to pay for travel expenses -
(a) Latest Income Tax Return;
(b) Bank Statements of last 6 months
The Mumbai consulate does mention having an invitation and a guarantor, so you may need to clarify with them if that information is needed when you plan to self-fund your stay.
Upvote:2
As me and the others mentioned in the comments earlier,
You don't need anyone else to sponsor you as long as you can sponsor yourself. You just need to prove to the embassy that you will not be a liability on the country and will not attempt illegal immigration.
All this detail might be required for the tourist visa, if you already have the tourist visa, there wouldn't be any problems.
If you are worried, a good idea is to call the Japanese embassy.