Sharehome/apartment hunting

Hi there!

I'm moving to Tokyo in late December on a student VISA. I'm in a hotel for the first two weeks, but after that date I want to have a permanent address, especially considering the need to have a registered address by that point. The amount of sharehome options on the sites I've seen (like Oak House) is a bit overwhelming, but welcoming considering my question.

I'm a bit apprehensive about booking something without doing a in-person viewing, but I also have a concern about waiting until I get to Japan, and there be little for options. Unfortunately I don't have friends who could do viewings for me.

For people that have done this before, would you suggest having something booked before arriving in Japan?

Or in your experience, will there be plenty of options left so I can do apartment viewings during my initial two-week hotel stay?