Ph.D

Wood Science

Research

1. Relationship of Wood Anatomical Features to Permeability and Fxation of Preservatives.
Impregnation and Fixation of preservatives are closely related to wood anatomical features. In this study, flow paths using CLSM and micro-distribution of preservatives using SEM-EDXA are visuallized and relationship among permeability, fixation and wood anatomy are studied.

2. Black heartwood formation of Cryptomeria japonica.
Variation of heartwood color in Cryptomeria japonica is large and black color restricts use of heartwood for decorative purposes. Because of high geen moisture content, drying and transport costs are high. In this study, distribution of potassium that related to blakening in heartwood is clarified and mechanism of black heartwood formation is studied.

3. Evaluation of Wood Quality and Cultivation of Fast Growing Trees for Sustainable Wood Utilization"
Cultivation of fast growing trees with high ability of carbon stock and evaluation of wood quality is important for creation of sustainable resources. We are studying about Melia azedarach. Variation of wood properties is clarified and possibilities of use and tree breeding for wood quaility are studied.

4. Shrinkage and Anisotropy of Tracheid Cells with Desorption using CLSM or LV-SEM.
As for checking during drying, visualization of shrinkage of wood cells with time is important for high quality dried wood. In this study, 4-dimensional changes of wood cell with desorption are visualized and shrinkage and anisotropy are studied.

5. Formation and Properties of Root Wood.
Cambial activity of root, root wood formation and propterties are unknown. In this study, seasonal change of root cambium, elongation from fusiform initial to wood fiber and microfibril angle are studied in relation to cambial age and environmental factor.

Research Interests

• Excavation of domestic fast growing hardwoods suitable for interior
  keyword : Fast growing trees, domestic hardwood species,　Melia azedarach, Cedrela sinensis, Liriodendron tulipifera, Alnus japonica, Quercus serrata
  2015.06～2017.02"Visualizations of shrinkage and micro- and macro-cracks with wood drying using microscopic techniques. Visualization of shrinkage of wood cells with time is important to understand checking behavior during drying.for high quality dried wood. In this study, 4-dimensional changes of wood cells with desorption are visualized and shrinkage and anisotropy are studied, in order to develop drying regimes that can minimize checking distortions, thus improvement the quality of dried wood..
• Excavation of domestic fast growing hardwoods suitable for interior
  keyword : Fast growing trees, domestic hardwood species,　Melia azedarach, Cedrela sinensis, Liriodendron tulipifera, Alnus japonica, Quercus serrata
  2015.06～2017.02"Visualizations of shrinkage and micro- and macro-cracks with wood drying using microscopic techniques. Visualization of shrinkage of wood cells with time is important to understand checking behavior during drying.for high quality dried wood. In this study, 4-dimensional changes of wood cells with desorption are visualized and shrinkage and anisotropy are studied, in order to develop drying regimes that can minimize checking distortions, thus improvement the quality of dried wood..
• Study on new demands for unused hardwood recources
  keyword : Fast growing trees, domestic hardwood species,　Melia azedarach, Cedrela sinensis, Liriodendron tulipifera, Choerospondias axillaris, Alnus japonica
  2015.12～2015.03"Visualizations of shrinkage and micro- and macro-cracks with wood drying using microscopic techniques. Visualization of shrinkage of wood cells with time is important to understand checking behavior during drying.for high quality dried wood. In this study, 4-dimensional changes of wood cells with desorption are visualized and shrinkage and anisotropy are studied, in order to develop drying regimes that can minimize checking distortions, thus improvement the quality of dried wood..
• Wood quality of fast growing tree species planted in Africa and Asia
  keyword : Fast growing trees,Pinus patula, Pinus kesya, Melia azedarach, Asia, Afrika
  2010.04"Visualizations of shrinkage and micro- and macro-cracks with wood drying using microscopic techniques. Visualization of shrinkage of wood cells with time is important to understand checking behavior during drying.for high quality dried wood. In this study, 4-dimensional changes of wood cells with desorption are visualized and shrinkage and anisotropy are studied, in order to develop drying regimes that can minimize checking distortions, thus improvement the quality of dried wood..
• Visualizations of degradation of wood during weathering using LVSEM techniques
  keyword : weathering, degradation, microcrack, LV-SEM
  2013.04～2016.03"Visualizations of shrinkage and micro- and macro-cracks with wood drying using microscopic techniques. Visualization of shrinkage of wood cells with time is important to understand checking behavior during drying.for high quality dried wood. In this study, 4-dimensional changes of wood cells with desorption are visualized and shrinkage and anisotropy are studied, in order to develop drying regimes that can minimize checking distortions, thus improvement the quality of dried wood..
• Visualizations of shrinkage, collapse and microcracks with wood drying using microscopic techniques
  keyword : shrinkage, desorption, microcrack, collapse, drying, CLSM, LV-SEM
  2001.04"Visualizations of shrinkage and micro- and macro-cracks with wood drying using microscopic techniques. Visualization of shrinkage of wood cells with time is important to understand checking behavior during drying.for high quality dried wood. In this study, 4-dimensional changes of wood cells with desorption are visualized and shrinkage and anisotropy are studied, in order to develop drying regimes that can minimize checking distortions, thus improvement the quality of dried wood..
• Evaluation of Wood Quality and Cultivation of Fast Growing Trees for Sustainable Wood Utilization
  keyword : fast growing tree, wood quality, wood properties, Melia azedarach, growth ring, specific gravity, density, MFA
  2002.04"Evaluation of Wood Quality and Cultivation of Fast Growing Trees for Sustainable Wood Utilization" Cultivation of fast growing trees with high ability of carbon stock and evaluation of wood quality are important for a sustainable supply and utilization of wood. We are studying a fast growing hardwood species Melia azedarach and Choerospondias axillaris, examinng their wood properies and exploring the possibilities of utilization of wood and tree breeding for wood quality improvement..
• Relationship of Wood Anatomical Features to Permeability, Fixation and Leaching of Preservatives
  keyword : wood permeability, flow pathway, Fixation, leaching, wood anatomy, CLSM, microdistribution, SEM-EDXA, LVSEM-EDXA
  2000.04"Relationship of Wood Anatomical Features to Permeability and Fxation of Preservatives" Impregnation and Fixation of preservatives are closely related to wood anatomical features. In this study, flow paths using CLSM and micro-distribution of preservatives using SEM-EDXA are visuallized and the relationship among permeability, fixation and wood anatomy is examined..
• Black heartwood formation of Cryptomeria japonica
  keyword : Cryptomeria japonica, black-heartwood, green moisture content, potassium, parenchyma cell
  2001.04"Black heartwood formation of Cryptomeria japonica" The heartwood color in Cryptomeria japonica varies greatly, and black color of heatwood restricts the use of heartwood for decorative purposes. Because of its high geen moisture content, drying and transport costs are high. In this study, the mechanism of black heartwood formation is studied, with a focus on the distribution of potassium and its involement in the blackening of heartwood..
• Wood quality on large-diameter domestic species from high aged-class plantation forest.
  keyword : wood quality, wood properties, growth characteristics, density, MFA, end use, sorting logs, sawing patterns
  2009.04"Formation and Properties of Root Wood" Cambial activity in roots, and root wood formation and propterties are poorly understand. In this study, seasonal changes in the activity of root cambium, fiber development from fusiform initials, with particular emphasis on microfibril angle assesment are studied in relation to cambial age and environmental factors..

Current and Past Project

• The purpose of this study is to establish sustainable utilization of wood resources in Africa. Genetic and environmental factors of wood properties and growth characteristics is clarified and tree breeding for wood quaility are studied.
• The purpose of this study is to improve wood quality of Acacia hybrids (A. mangium X A. auriculiformis). Genetic and environmental factors of wood properties and growth characteristics is clarified and tree breeding for wood quaility are studied.
• The properties of driftwoods occurring by typhoon are evaluated and the possibility of utilization is examined.
• The properties of driftwoods occurring by typhoon are evaluated and the possibility of utilization is examined.
• Cultivation of fast growing trees with high ability of carbon stock and evaluation of wood quality are important for creation of sustainable resources. Variation of wood properties of Choerospondias axillaris is clarified and possibilities of use and tree breeding for wood quaility are studied.

Academic Activities Membership in Academic Society

• The Japan Wood Research Society
• Japan Wood Protection Associate
• Wood Technological Association of Japan
• The Japanese Forest Society
• The Japanese Society of Microscopy

Educational Activities

Professional and Outreach Activities