| Using EIKEN, TOEFL, and TOEIC to Award EFL Course Credits in Japanese Universities | 2014-04 -- 2017-03 | Innami Yo | Japan Society for the Promotion of Science/Grant-in-Aid for Scientific Research (C) | 4,420,000Yen |
| Establishment of a practical speaking test and peer assessment system to promote speech production | 2011-04 -- 2016-03 | HIRAI Akiyo | Japan Society for the Promotion of Science/Grant-in-Aid for Scientific Research (C) | 4,810,000Yen |
| Development of speaking ability among Japanese learners of English: A meta-analysis | 2010-04 -- 2014-03 | KOIZUMI Rie | Japan Society for the Promotion of Science/Grant-in-Aid for Young Scientists (B) | 2,470,000Yen |
| Estimation of English Proficiency by Measuring Three Dimensions of Vocabulary Knowledge: Vocabulary Size, Organization, and Lexical Access Speed | 2010-04 -- 2014-03 | MOCHIZUKI Masamichi | Japan Society for the Promotion of Science (JSPS)/Grant-in-Aid for Scientific Research (B) | 17,680,000Yen |
| Examining the Methods Employed to Analyze the Spoken Discourse of Japanese Learners of English: Characteristics of Discourse Analytic Measures | 2007-04 -- 2010-03 | KOIZUMI Rie | Japan Society for the Promotion of Science/Grant-in-Aid for Young Scientists (B) | 1,800,000Yen |
| Research and development of a practical speaking test with positive effect on learning | 2007 -- 2010 | HIRAI Akiyo | Japan Society for the Promotion of Science/Grant-in-Aid for Scientific Research (C) | 4,290,000Yen |
| Development of a Vocabulary Test Battery Estimating English Skills and Proficiency : Integrating Vocabulary Size, Organization, and Access Speed | 2007-04 -- 2010-03 | MOCHIZUKI Masamichi | Japan Society for the Promotion of Science/Grant-in-Aid for Scientific Research (B) | 20,150,000Yen |
| 日本人英語学習者における発表語彙知識の広さと深さの関係 | 2004 -- 2004 | KOIZUMI Rie | Eiken Foundation of Japan/Research Grant | 300,000Yen |
| 語彙知識によるスピーキング能力の予測可能性 | 2003 -- 2004-03 | KOIZUMI Rie | Japan Language Testing Association (JLTA)/Research Grant | |