- 2021/04 - 現在 東京大学大学院 総合文化研究科 教授
- 2020/04 - 現在 Rikkyo University College of Arts
- 2023/04 - 2023/09 Kyoto University
- 2021/04 - 2023/03 Aoyama Gakuin University College of Literature
- 2019/04 - 2021/03 東京大学大学院 総合文化研究科 准教授
- 2019/04 - 2020/03 Waseda University
- 2018/04 - 2019/03 Sophia University Faculty of Humanities
- 2016/04 - 2019/03 Rikkyo University College of Arts
- 2012/04 - 2019/03 April Present Professor, Waseda Univ.
- 2009/04 - 2015/03 Rikkyo University College of Arts
- 2007/04 - 2012/03 April March 2012 Associate Professor, Waseda Univ.
- 2005/04 - 2007/03 April, March, 2007 Assistant Professor, Waseda Univ.
- 2004/04 - 2005/03 Osaka University Faculty of Language and Culture
- 2003 - 2005/03 Assistant Professor, Otemon Univ.
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Modern Language Association
, Japan Society for Children's Literature
, Japan Comparative Literature Association
, English Literary Society of Japan
, Mark Twain Circle of America
, American Studies Association
, The American Literature Society of Japan
, 日本英文学会関東支部
, The Japan Mark Twain Society
, Japanese Association of American Studies