2023 - 2027 Shade tolerance in conifer species influences susceptibility to winter drought via photosynthetic responses
2021 - 2026 How do tree absorb water from leaf surface? - Development of tree response moedl include foliar water uptake -
2015 - 2018 Causes of tree death due to drought; hydraulic failure and carbon starvation
2012 - 2015 The relationships between high biomass production and ecophysiological properties for two Salix species (Salix sachalinensis Fr. Schm and S. pet-susu Kimura)
2009 - 2012 Role of aquaporins within a leaf in leaf hydraulics and gas exchange of tree species
2006 - 2009 Evaluation of nutrient and carbon use in tropical dry forests in Southeast Asia
2006 - 2008 アクアポリンと葉脈による葉の通水および光合成特性への効果
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Papers (46):
Tetsuto Sugai, Hisanori Harayama, Hiroyuki Tobita, Mitsutoshi Kitao. Effects of soil compaction and vegetation weeding on the above-, and belowground growth of boreal evergreen conifer seedlings. New Forests. 2024
Hisanori Harayama, Ikutaro Tsuyama, Takeshi Yamada, Mitsutoshi Kitao, Naoyuki Furuya, Kenichi Yazaki, Tetsuto Sugai, Akira Uemura, Shozo Sasaki, Hajime Utsugi. Eight-Year Survival and Growth of Sakhalin Fir (Abies sachalinensis) Seedlings with One Weeding Operation: Impact of Mechanical Site Preparation, Vegetation Release, Summer Planting, Stock Type, and Forwarder Trail. Forests. 2024. 15. 6. 1012
Mitsutoshi Kitao, Hisanori Harayama, Naoyuki Furuya, Evgenios Agathokleous, Satoshi Ishibashi. Regeneration of forest floor-grown seedlings of Sakhalin fir can be promoted through shading by shelter trees. Journal of Forest Research. 2023. 1-8
Hisanori Harayama, Ikutaro Tsuyama, Mitsutoshi Kitao, Takeshi Yamada, Naoyuki Furuya, Hajime Utsugi, Shozo Sasaki. Effects of Seedling Size, Stock Type, and Mechanical Site Preparation Method on Initial Survival and Growth of Japanese Larch (Larix kaempferi) Seedlings. Forests. 2023. 14. 4. 784
Hisanori Harayama, Ikutaro Tsuyama, Akira Uemura, Mitsutoshi Kitao, Qingmin Han, Shigeo Kuramoto, Hajime Utsugi. Growth and survival of hybrid larch F1 (Larix gmelinii var. japonica × L. kaempferi) and Japanese larch under various intensities of competition. New Forests. 2022. 54. 5. 945-961