What is the best Japanese school in Tokyo?
I am thinking of going to live in Japan to study the language but find the range of schools available baffling. Does anyone have any clue what school/uni/college would be best?
Thanks! 
Hi, I’m a native Japanese speaker. Sorry for my poor English, but I want to be of your help.
Universities in Japan I recommend or know:
Check each uni’s website and see if there are a Japanese program and other details of the program and uni itself.
4-year national universities
“Toyko University of Foreign Studies”
http://www.tufs.ac.jp/abouttufs/index-e.html
“Nagoya University”
http://www.ecis.nagoya-u.ac.jp/en/
4-year private universities
“Sophia University”
http://www.sophia.ac.jp/E/E_toppage.nsf/
“Kansai University of Foreign Studies,” or Kansai Gaidai University
http://www.kansaigaidai.ac.jp/asp/
“Tokyo International University”
http://www.tiu.ac.jp/english/
Japanese program of this uni, which is called, “JSP”
http://www.tiu.ac.jp/jsp/index.html
”Jyousai International University”
(PDF brochure of Japanese program)
http://www.jiu.ac.jp/bekka/pdf/english.pdf
Also try google, searching the words, “Japanese program,” “Japan,” “universities (in Japan)” and so on.
Are you planning to learn Japanese language itself or to study about Japan by using Japanese?
Anyway, good luck on your learning Japanese here, Japan!
Hope my answer helps! 
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Additional answer
I’m sorry. I mistakenly made a quick judgment and listed universities that are not located in Tokyo. But please check the unis as references.
Universities in Tokyo are only “Tokyo University of Foreign Studies” and “Sophia University.”
“Tokyo International University” is NOT located in Tokyo.