Hey Henbaka!
Sorry for going a little off topic, but will you be attending Waseda's ILJP or SILS classes by any chance? Just wondering because I applied to the ILJP program (not as an exchange student though) and was accepted, but I opted to attend a year-long program at a different university in the end, hehe..
Before, I asked around about the Waseda dorms, and I think the international kids dorms are actually quite close to campus? Well either way, I think it's a great idea you're looking to live off campus if you want to practice Japanese; I have a friend who did the exchange at Waseda two years ago and she said living in the international dorm was a pity since you're always speaking English.
Are you only looking at guesthouses? Or also individual apartments? Well here are three links to add (some might not be in the price range you specified though):
Tokyo Room Finder - Guest House, Apartment and Shared Apartment Finder for Tokyo, Japan
Guesthouses or Gaijin Houses (listings of guesthouse sites)
http://www.gakusei-kaikan.com/index.html (only in Japanese)
If you're interested in some apartment listings with a little higher budget, I have some other links as well.
The last one up there is a Japanese listing of student dorms. They do require a guarantor and a refundable deposit and some other messy fees, but a lot of the other "gaijin guesthouses" or whatnot I've been looking at don't have private bathrooms, which is something I really want lol. Also, the price range for this Japanese site is about 70000-90000/month, but I'm looking around the Meguro area. It's on the expensive side, but I hear that it's reasonable for a mid-Tokyo location. Hmm sorry, I don't know how much that helped!
And also sorry for the long-winded reply! I'm in the same position as you so thanks for making this thread--I know I need tips too!
