Hi, don't worry my admission documents said the same thing. I'm sure we're accepted for the full two years, it's written on all our documents and the MEXT minimum is 18 months. I've been told to wait til March to hear my room number for Komaba International Lodge Main which I presume means I've got a place in the lodge already.
Just in case some people were still perplexed on the issue, I received an email confirming what people have said earlier about the being accepted for only five months at Todai. Here's an email from the Int'l Student Section:
The scholarship for a research student will truly be payable for 24
months from April 2015 through March 2017.
As for the term of research of the University of Tokyo, all research
students are accepted for a period of five months or seven months in
principle.
However, as you mentioned, this period can be extended.
Example:
enrolling in April 2015
April 1, 2015 - August 31, 2015 (five months)
↓
September 1, 2015 - March 31, 2016 (seven months)
↓
April 1, 2016 - August 31, 2016 (five months)
↓
September 1, 2016 - March 31, 2017 (seven months)
Hope this helps
