Updated: 2012-09-05

Fujiyoshida forest meteorology research site (FJY)

Observation tower (32m) in red pine forest in Fujiyoshida and SAT at 27.3m.

Overview of this site

Fujiyoshida forest meteorology research site is located in Fujiyoshida city, Yamanashi Pref. which is on Kenmarubi lava flow in Mt. Fuji. The dominant species is red pine and there are also mixed evergreen and deciduous broadlef trees such as holly and azalea. Because of its high altitude (1000m), the climate is relatively cold for its latitude and snowdepth reaches up to 0.5m in winter. Soil is poorly developed due to underneath volcanic lava, land surafce is covered with a very thin layer of liter and its decomposing materials. We are measureing CO2 and energy balance in this red pine forest.

This research site is registered to AsiaFlux/JapanFlux and Phenological Eyes Network, or PEN, (Site Code:FJY) and it is also a part of associate site of JaLTER (Site Code:FKJ). Participating in terrestrial observation networks across a range of research area brings us a strong collaboration with different study field.

Position35 deg 27.275 min N (35.4546 deg N),
138 deg 45.737min E (138.7623 deg E) (WGS1984)
Climate ClassificationTemperate (Cfb, Temperate - Fully humid - Warm summer)
Annual Mean Temperature9.5°C(year 2000-2008)
Annual Mean Precipitation1954mm(year 2000-2007)
Annual Mean Solar Raadiation14.0MJm-2day-1(year 2000-2008)
Monthly mean temperature (year 2000-2008) and
precipitation (year 2000-2007)
Monthly mean solar radiation (year 2000-2008)
VegetationEvergreen needleleaf forest
Dominant SpeciesPinus densiflora (japanese red pine), Ilex pedunculosa (japanese holly), Quercus mongolica (Mizunara oak), Quercus serrata (Konara oak)
Canopy Heightapprox. 20m
Breast High Diameterapprox. 30cm (japanese red pine)
Ageapprox. 100years (japanese red pine)
Leaf Area Indexmax. 5
Community StructureOverstory: japanese red pine
Understory: Deciduous broadleaf and evergreen needleleaf
Soil TypeImmature soil, lm (litter and organic matter with partially exposed volcanic lava)
Artificial DisturbanceHighly disturbed until 90 years ago
Observation Period
Period1 August 1999 to present
Tower Height32m
Access to Tower TopPossible
Electric Power SupplyCommercial power supply AC100V 30A
Communication EquipmentWire telephone
AccommodationNot available


 Name and ModelLevel
Downward Short-wave RadiationKipp&Zonen, CM-6F32.0 m
Upward Short-wave RadiationKip&Zonnen, CM-6B28.6 m
Downward Long-wave RadiationEppley, PIR-F32.0 m
Upward Long-wave RadiationEppley, PIR28.6 m
Downward PPFDLI-COR, Li190-SA32.0 m
Upward PPFDLI-COR, Li190-SA28.6 m
Downward PPFD below CanopyLI-COR, Li190-SA2.4 m
Downward Short-wave Radiation below CanopyKipp&Zonen, PCM03-F2.47 m
All-wave Net RadiationREBS Q*72.4m
Air temperaturePlatinum resistance thermometer; Vaisala HMP-45D31.5, 22.7, 18.8, 13.5, 9.3, 3.4 m
HumidityCapacitive hygrometer;
Vaisala HMP-45D
31.5, 22.7, 18.8, 13.5, 9.3, 3.4 m
Wind SpeedSonic anemometer; Vaisala WMT5231.8, 27.2, 23.0 m
Wind DirectionYokogawa Denshikiki A-80232.2 m
Barometric PressureVaisala PTB-1002.0 m
Soil TemperatureThermocouple(Handmade)0.02, 0.05, 0.1, 0.25, 0.5 m deep
Soil Heat FluxEKO, MF-810.02 m deep
Snow DepthUIZIN, UIZ-LS200Open space
Rainfall DurationWetness sensor; PREDE, PPS-0222.7m
PrecipitationTipping bucket raingauge; Yokogawa Denshikiki, B071-00approx. 1m, Open space
Data Logger
Sampling PeriodEvery 20 seconds
Averaging Period5 minutes
RecorderEto Denki, Cadac2 and PC

Turbulence Fluctuation Method (Eddy Covariance Method)

SystemClosed-path & Open-path
Three-dimensional Sonic
KAIJO DAT-600-3TSensor span0.2m
Level27.2 m
Gas Analyzer
LI-COR LI-6262Distance between
gas intake and analyzer
approx. 40m
Height of intake26.9m
Gas Analyzer
LI-COR LI-7500Level27.1m
Thermo-hygrometerVaisala HMP-45ALevel26.9m
BarometerVaisala PTB-210Level27.6m
Data Logger
Sampling MethodContinuous
Averaging Period0 second
Sampling Frequency10 Hz
Filters for AntialiasingAvailable
CutOff Frequency24 Hz
Recording RangeAll data
RecorderCampbell CR3000
MediaCompact Flash
Flux Calculation
Calculation Period1800 s
MethodDetrendingw, u, Ta, CO2, H2O
Coordinate RotationCorrected
Line AveragingNot-corrected
Sensor SeparationNot-corrected
Humidity Correction of Virtual TemperatureCorrected

Vertical profiling CO2 Concentration in Canopy

InstrumentsLI-COR LI-6262
Sampling10 seconds
Level27.2, 22.7, 18.9, 13.1, 9.4, 1.9 m
Sampling PeriodEvery 6 minutes at a level x 6 levels
Averaging Period10 seconds

Other Observation

InstrumentLI-COR LI-6400
Observation Frequency-
Soil Respiration
MethodCloed Chamber Method
Observation Frequency-
MethodLitter Trap
Observation Frequency-
MethodTree diameter and height
Observation Frequency-

Observations using portable system

Inter-comparison measurements were conducted using the portable flux observation system  which was developed to provide an on-site reference for quality control of observed flux data and to standardize the measurement systems.
Inter-comparison measurement in September and November 2007 
Inter-comparison measurement in April 2010 

Collaboration with Other Research Institutes

Observation using unmanned helicopter

In mid-September 2010, spectroscopic characteristic and canopy structure of a red pine forest were observed from the air using a radio control helicopter by research members of Center for Environmental Remote Sensing, Chiba University.
More details 

Stable isotope analysis

In July 2010, carbon and oxygen isotope ratio in CO2; hydrogen and oxygen isotope ratio in H2O of atmosphere in various heights; and; carbon and oxygen isotope ratio in CO2 of sampling air in leaf-chamber were observed using a laser spectrometer. Simultaneously, photosynthesis and transpiration rates were measured by a gas Analyzer.
More details 



MIZOGUCHI Yasuko, OHTANI Yoshikazu, TAKANASHI Satoru, IWATA Hiroki, YASUDA Yukio, NAKAI Yuichiro(2012): Seasonal and interannual variation in net ecosystem production of an evergreen needleleaf forest in Japan. Journal of Forest Research, 17(3):283-295.

MIZOGUCHI Yasuko, OHTANI Yoshikazu, NAKAI Yuichiro, TAKANASHI Satoru, IWATA Hiroki, YASUDA Yukio, NAKANO Takashi, YASUDA Taisuke, WATANABE Tsutomu (2011): Climatic characteristics of the Fujiyoshida forest meteorology research site. Mount Fuji Research, 5:1-6

OHTANI Yoshikazu, MIZOGUCHI Yasuko, WATANABE Tsutomu, YASUDA Yukio (2005): Parameterization of NEP for gap filling in a cool-temperate coniferous forest in Fujiyoshida, Japan. Journal of Agricultural Meteorology, 60(5):769-772

OHTANI Yoshikazu, SAIGUSA Nobuko, YAMAMOTO Susumu, MIZOGUCHI Yasuko, WATANABE Tsutomu, YASUDA Yukio, MURAYAMA Shohei (2005): Characteristics of CO2 fluxes in cool-temperate coniferous and deciduous broadleaf forests in Japan. Phyton, 45(4):73-80

IWATA Hiroki, ASANUMA Jun, OHTANI Yoshikazu, MIZOGUCHI Yasuko, YASUDA Yukio (2009): Vertical Length Scale of Transporting Eddies for sensible Heat in the Unstable Roughness Sublayer Over a Forest Canopy. Journal of Agricultural Meteorology, 65(1):1-9

HAN Qingmin, KAWASAKI Tatsuro, NAKANO Takashi, CHIBA Yukihiro (2008): Leaf-age effects on seasonal variability in photosynthetic parameters and its relationships with leaf mass per area and leaf nitrogen concentration within a Pinus densiflora crown. Tree Physiology, 28(4):551-558

TANABE Hiromi, ABE Yoshiko, NAKANO Takashi, TANGE Takeshi (2006): Carbon and nitrogen changes in A0 horizons in a Pinus densiflora forest established on a Mt.Fuji lava flow. Japanese Journal of Forest Environment, 48(1):1-8

OHTSUKA Toshiyuki, GOTO Takehiro, SUGITA Mikio, NAKAJIMA Takafumi, IKEGUCHI Hitoshi (2003): The origin of pine forest on Ken-marubi lava flow on the lower slopes of Mt.Fuji. Vegetation Science, 20:43-54 [in Japanese with an English abstract]

Research Fund

- Major Facility Installation for Carbon Dioxide Monitoring, Forestry Agency, MAFF*

- Research Grant, FFPRI

- Research Fund (Evaluation, Adaptation and Mitigation of Global Warming in Agriculture, Forestry and Fisheries: Research and Development), MAFF*

- Global Environment Research Account for National Institutes, MOE**

- Global Environment Research Fund, MOE**

- Grants-in-Aid for Scientific Research, MEXT***

* MAFF: Ministry of Agriculture, Forestry and Fisheries of Japan
** MOE: Ministry of the Environment
*** MEXT: Ministry of Education, Culture, Sports, Science and Technology


Satoru TAKANASHI, Takafumi MIYAMA, Yasuko MIZOGUCHI, Yoshikazu OHTANI, Yuichiro NAKAI

Cooperative Researchers

Takashi NAKANO, Taisuke YASUDA (Yamanashi Institute of Environmental Sciences), Toshiyuki OHTSUKA (Gifu University)

Contact Information

Forest Meteorology Lab.,
Department of Disaster Prevention, Meteorology and Hydrology,
Forestry and Forest Products Research Institute (FFPRI)
Address: 1 Matsunosato, Tsukuba, Ibaraki, 305-8687 JAPAN
+81-298-73-3211 (main)