- 2018 - 2023 Ovaries of ant workers: function and significance in colonial life
- 2019 - 2022 On molecular mechanism to produce phenotypically adaptive variation among genetic clones of ants
- 2016 - 2019 Evolution of army ant syndrome: lessons from non-army ant doryline ants
- 2013 - 2016 Differences in behavioral traits among supercolonies of the Argentine ant Linepithema humile
- 2012 - 2015 Significance of caste specialization in ants: lesson from geographic variation of social organization
- 2010 - 2012 The evolution and maintenance of supercolony in the invasive Argentine ant
- 2010 - 2012 Reality and illusion on ecological risks of invasive Argentine ants
- 2010 - 2012 Statistical Modeling to predict spatial distribution of an exotic ant and to evaluate its effects on native ant community
- 2009 - 2011 Methodological studies for the control of three invasive alien ant species using molecular-biological techniques, sterile males and natural enemies
- 2006 - 2009 Role of ants as prey
- 2006 - 2008 Sex and non-sex in social evolution in insects
- 2005 - 2007 Acomprehensive study on invasive aliea species and supercolonies of ants
- 2002 - 2005 Effects of invasive ants on the Japanese biota, and mechanisms underlying the expansion of their distribution
- 2002 - 2004 Function of exocrine gland substances in topical ants
- 1999 - 2000 Diversity of social organization, parasites and symbionts in tropical ants.
- 1998 - 1999 アリ類における外分泌腺構造のカスト間比較と女王シグナルの進化
- 1996 - 1998 Life histroy strategy of tropical insects
- 1996 - 1998 Nutritional Ecology of Termites and Ants in Tropcal Resion
- 1996 - 1996 原始的アリ類における社会構造の多様性とその意義
- 1995 - 1995 多女王制アリ類の女王間における繁殖をめぐる競争の発生要因
- 1993 - 1994 Long-term dynamics of insect populations in Indonesia
- 侵入害虫アリの生態
- アリ類の生活史と社会構造の多様性に関する研究
- Diversity of life history and social organization in ants
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