The Global Education Foundation is offering scholarships to go towards all or part of the IB exam fees (for Article 1 schools only in 2016), and in some cases, computers and graphing calculators, for students in IB World Schools.
More information (in Japanese):
http://www.sekaideikiru.com/#!about/c1uzq
The GEF website also includes information about the IB in Japanese.
Global Education Foundation Offers Scholarships to Help Students Enter IB Schools