In order to get a visa to Japan, it is not enough to redeem the hotel and tickets. It is necessary to provide a Japanese guarantor.

The Japanese Consulate issues visas on three occasions: a short trip for business purposes, visits to friends or relatives (by invitation), a tour of the agency's warranty.

This country is very carefully considering every application for entry, so the travel agency acting as a guarantor must in turn provide a full program of the tourist's stay, a letter of guarantee, as well as documents confirming its activities.

In your case, you can not do at least without booking a hotel room through an agency. You can obtain a visa yourself only if there is a citizen of Japan who will officially pledge for you.