Japan Foundation Fellowships (Japan)
For the purpose of promoting Japanese studies overseas, this program provides support to preeminent foreign scholars in Japanese studies to give them an opportunity to conduct research in Japan.The Japan Foundation conducts programs in the three major areas of Arts and Cultural Exchange, Japanese-Language Education Overseas, Japanese Studies and Intellectual Exchange, as well as Strengthening Cultural Exchange in Asia. There are applicable programs in each of these areas, and support is provided for activities conducted by individuals and organizations that are involved in international exchange.
The fellowships are open to scholars of all ages. The program offers the fellowship to PhD candidates who have in principle completed their coursework and are starting to write (4-12 months).
by the end on November each year (December, 1). There are several institutes through which you can apply related to your nationality!
More info: https://www.jpf.go.jp/e/program/dl/intel/pdf/pg_RJS-FW_e.pdf
Three GEAS fellows of Cohort I, II and III have already received a Japan foundation fellowship and may be of help.