2000-2001
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Basic Research C(1) – Grant No. 12680305: Mother tongue effects of native Chinese speakers learning the Japanese language on understanding processes of Japanese kanji.

2002-2003
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Basic Research C(1) – Grant No. 14580333: Kanji semantic network and acquisition of two-kanji compound words by native Chinese speakers learning the Japanese language.

2004-2005
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Basic Research C(2) – Grant No. 16520324: Acquisition of Japanese word orders by native Chinese, Korean and Turkish speakers learning the Japanese language.

2006-2007
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Basic Research C(2) – Grant No. #######: Acquisition of Japanese noun structures by native Chinese, Korean and Turkish speakers learning the Japanese language.

2008-2010
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Basic Research C – Grant No. 20520468: Acquisition of Japanese collocational expressions by native Chinese and Korean speakers learning the Japanese language.