I found a website, which although English, it shows how you can get to know a lot of Japan in just 19 days, (I think TT 3 months is not enough) bringing tips, photos, travel schedules. So if you are thinking of taking a trip to Japan, I recommend taking a look at this site:
The Site consists of 36 articles showing in detail each place visited, full of commentary photos just to make you jealous. The Site also details each location visited on the map and also allows the use of Street View to see all the details.
If you have a good knowledge of English, or are willing to use the Google translator, or just want to see the wonderful photos, be sure to access this site.