- 2020 - 2025 Toward the elucidation of origin of rush cultivation and the origin of tatami mats; genetic diversity analysis of extant rushes and old tatami rushes
- 2017 - 2022 The origin and evolutionary history of the flora of Japanese Archipelago through on the phylogeographic analyses of grassland plants in the Northeast Asia
- 2015 - 2018 Phylogeny and genetic background of myrmecophytic morphology of Callicarpa saccata (Lamiaceae).
- 2011 - 2014 Conservation biology on domestication and escape of East Asian ornamenntal plant species
- 2010 - 2013 Phylogenetic analysis of the plants which experienced evolutionary radiation in East Asia
- 2011 - 2013 DNA analysis for choromosome size changing in plant
- 2008 - 2010 What kind of DNA sequences is involved in chromosome size reduction in genus Aster?
- 2007 - 2009 Oversea research on international colonization as weeds in genus Echinochloa
- 2006 - 2007 Molecular and cytogenetic studies to estimate genome size reduction of chromosomal DNA in genus Aster
- 2003 - 2005 Ecological genetic studies on in-situ conservation of plant genetic resources in disturbed habitats
- 2002 - 2004 染色体進化におけるゲノムサイズ減少の解析
- 2002 - 2003 Speciation in the genus Stevia of Mexico and Brazil
- 2000 - 2001 Variation and evolution of sexual and asexual races in Mexican Stevia
- 1998 - 2000 ANALYSIS ON ECOLOGICAL AND GENETIC DIVERSITY EVOLVED UNDER CULTIVATED ENVIRONMENT IN GENUS ECHINOCHLOA
- 1998 - 1999 染色体進化におけるゲノムサイズ減少の解析
- 1998 - 1999 Molecular Phylogeny and Evolution of Helenioid Asteraceae
- 1997 - 1997 Molecular phylogeny and comparative ecology of Mexican Stevia
- 1995 - 1996 Molecular phylogeny and comparative ecology of Mexican Stevia
- 1995 - 1995 Molecular phytogeography of Aster and Kalimeris in East Asia
- 1994 - 1994 Molecular Analysis of Polyploid Speciation in Aster
- 1993 - 1994 Evolution of asexual reproduction in the New World tropics
- 1993 - 1993 核DNAを用いた倍数体複合体の系統解析
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