Department of Global Agricultural Sciences

Graduate School of Agricultural and Life Sciences at The University of Tokyo

Our staff

Name	Takuya Kajimoto
Position	Associate Professor
Department	Matter Production Research Laboratory, Forest Ecosystem Monitoring Research Group, Forestry and Forest Products Research Institute
Professional Experience & Education	Lab Director, Forest Ecosystem Monitoring Research Group, Forestry and Forest Products Research Institute? (Matter Production) Group Leader, Forest Ecosystem Monitoring Research Group, Forestry and Forest Products Research Institute (Managed Forest) Group Leader, Kyushu Regional Breeding Office, Forestry and Forest Products Research Institute (Forest Dynamics) Researcher, Tohoku Research Center, Forestry and Forest Products Research Institute Special Researcher, Science and Technology Agency (Forestry and Forest Products Research Institute) Part-time teacher, School of General Education, Chukyo University Completed Doctoral Course, School of Bio agricultural Sciences, School of Agricultural Sciences, Nagoya University B.S., Department of Forestry, School of Agricultural Sciences, Nagoya University
Email	tkaji@ffpri.affrc.go.jp
URL	http://www.ffpri.affrc.go.jp/en/index.html

Disciplines

Forest Ecology, Forestry, Carbon Dynamics (Subarctic Forest, Tropical Forest)

Research interests

■ The dynamic state of forests and carbon Forests have the important role of circulating carbon between the land and the air all over the earth through the exchange of gases by photosynthesis and respiration. There are three primary forest ecological systems distributed throughout the earth, starting from the north: subarctic forests, temperate forests, and tropical forests. It is not well understood, however, how each of these forests is related to carbon circulation on a global scale, as well as the details of that relationship. It is necessary to have a broad and highly precise understanding of the volume of carbon accumulated in forests (biomass) to prevent the felling and degradation of forests through measures against global warming. (REDD+). From this perspective, I am now involved with research projects overseas for the dynamic state of carbon in the subarctic forests of Siberia and the tropical forests in the Amazon region of Brazil. Managing planted forests About half of Japan's forests are planted forests of cedar, cypress, and other trees. Most of these were planted after the war and are now 40-60 years old. They have arrived at the felling period. Even if these trees are felled, however, it would not be profitable due to a downturn in the forestry industry. As thinning is not possible, long-term management without postponing the felling period itself is becoming the norm. I am conducting research into potential commercial methods for large tree production primarily from the aspect of ?tree growth to seek the appropriate management methods for planted forests. ----- Primary field studies I have conducted in Japan and overseas 1. Overseas - The tundra and the carbon dynamic state and root system growth in subarctic forests (Siberia) - Research into underground biomass in tropical forests (Malaysia, Amazon region) 2. Japan - Forest management in heavy snow areas in the Tohoku region - Tree growth in subalpine areas, the disruption of snow accumulation, and the forest dynamic state - Techniques for growing and managing artificial coniferous forests ■ Primary Papers 1. Overseas Research Kajimoto, T., Matsuura, Y., Sofronov, M.A., Volokitina, A.V., Mori, S., Osawa, A. and Abaimov, A.P. (1999) Above- and belowground biomass and net primary productivity of a Larix gmelinii stand near Tura, central Siberia. Tree Physiology 19:815-822. Kajimoto, T., Matsuura, Y., Osawa, A., Prokushkin, A.S., Sofronov, M.A. and Abaimov, A.P. (2003) Root system development of Larix gmelinii trees by micro-scale conditions of permafrost soils in central Siberia. Plant Soil 255:281-292. Kajimoto, T., Matsuura, Y., Osawa, A., Abaimov, A.P., Zyryanova, O.A., Isaev, A..P, Yefremov, D.P., Mori, S., and Koike, T. (2006) Size-mass allometry and biomass allocation of two larch species growing on the continuous permafrost region in Siberia. For Ecol Manage 222:314-325. Kajimoto, T., Osawa, A., Matsuura, Y., Abaimov, A.P., Zyryanova, O.A., Kondo, K., Tokuchi, N., and Hirobe, M. (2007) Individual-based measurement and analysis of root system development: case studies for Larix gmelinii trees growing on the permafrost region in Siberia. J Forest Res 12:103-112. Niiyama, K., Kajimoto, T., Matsuura, Y., Yamashita, T., Matsuo, N., Yashiro, Y., Ripin, A, Kassim, A.R. and Noor N.S. (2010) Estimation of root biomass based on excavation of individual root systems in a primary dipterocarp forest in Pasoh Forest Reserve, Peninsular Malaysia. J Trop Ecol 26:271-284. Kajimoto, T., Osawa, A., Usoltsev, V.A., and Abaimov, A.P. (2010) Biomass and productivity of Siberian larch forest ecosystems. In: Osawa A, Zyryanova OA, Matsuura Y, Kajimoto T, Wein RW (eds.) Permafrost Ecosystems: Siberian Larch Forests. Ecological Studies, Vol. 209, Springer, pp 99-122. Kajimoto, T. (2010) Root system development of larch trees growing on Siberian permafrost. In: Osawa A et al (eds.) Permafrost Ecosystems. Ecological Studies, Vol. 209, Springer, pp 303-330. 2. Research in Japan Takuya Kajimoto (1995) The ecology of the dwarf stone pine, with a focus on matter production and the renewal process / Ecological Society of Japan 45:57-72. Hiromichi Onodera, Yumi Tanabe, Takuya Kajimoto, Hiromu Daimaru (1995)�@The dynamic state of snow and ecological characteristics trees on mountain slopes with heavy snowfall / The Japanese Society of Forest Environment 37: 59-66. Kajimoto, T., Onodera, H., Ikeda, S., Daimaru, H. & Seki, T. (1998) Seedling establishment of subalpine stone pine Pinus pumila by nutcracker seed dispersal on Mt. Yumori, northern Japan. Arctic and Alpine Research 30:408-418. Kajimoto, T., Seki, T., Ikeda, S., Daimaru, H., Okamoto, T. and Onodera, H. (2002) Effects of Snowfall Fluctuation on Tree Growth and Establishment of Subalpine Abies mariesii near Upper Forest-limit of Mt. Yumori, Northern Japan. Arctic, Antarctic and Alpine Research 34: 191-200. Kajimoto, T. (2002) Factors affecting seedling recruitment and survivorship of Japanese subalpine stone pine, Pinus pumila, after seed dispersal by nutcrackers. Ecological Research 17: 481-491. Kajimoto, T., Daimaru, H., Okamoto, T., Otani, T. and Onodera, H. (2004) Effects of snow avalanche disturbance on regeneration of subalpine Abies mariesii forest, northern Japan. Arctic, Antarctic and Alpine Research 36: 436-445. Kajimoto, T., Hitsuma, G., Masaki, T. and Kanazashi, T. (2006) Growth pattern analysis and stemwood production in an unmanaged old plantation of Hiba, Thujopsis dolabrata, in northern Japan. J For Res 11:107-116 Araki, M.G., Utsugi, H., Kajimoto, T., Han, Q., Kawasaki, T. and Chiba, Y. (2010) Estimation of whole-stem respiration, incorporating vertical and seasonal variations in stem CO2 efflux rate, of Chamaecyparis obtusa trees. J Forest Res 15: 115-122.