Koizumi Rie
- Academic societies
1999-04 -- 2020-03 The Tsukuba Society of English Language Teaching 2023-12 -- (current) The Japanese Association for Research on University Admissions 1999-09 -- (current) The Japan Language Testing Association (JLTA)
| 1999-04 -- 2020-03 | The Tsukuba Society of English Language Teaching |
| 2023-12 -- (current) | The Japanese Association for Research on University Admissions |
| 1999-09 -- (current) | The Japan Language Testing Association (JLTA) |