I was able to get an apartment in Okinawa without it, but in Hokkaido, my father-in-law had to do so.
If you are staying just for several weeks or a few months, you should try so-called "Weekly Mansion" "Monthly Mansion" - the word "mansion" should not be taken literally, it simply means apartment - basically you do not need a guarantor, and it is cheaper than staying at a hotel.
Please tell us how you plan to stay longer than a tourist (90 days max)? What visa can you get?
Not answering questions like Frank's is just plain rude.
Unless you only look for places in Hokkaido or Okinawa, we have listed info on guest houses in the Kanto and the Kansai area here
=> Guest houses in Japan - Japan Portal
Why is visa not a problem? The answer may be key to your housing. As I asked (and you didn't answer yet), what sort of visa ...
can you get or
do you have or
do you want?
You've only said what you WANT to do, not HOW you plan to do it.
And, while we're at it, what is your price range?
Money? It only costs 4000 yen to get the visa stamp. And, why are you being so secretive about what sort of visa you have?If I say VISA is not a problem is for I have one and have money for that of course.
If I don't exceed 90 days then everything will be ok, right and no problems with renting as I imagine or I need to find some special service providers for that?