Introduction
The first record of meteorological observations was from the UTCBF in October 1904. Since then, UTF has accumulated more than 100 years of meteorological data. These long-term meteorological datasets in forested areas are invaluable for research into global warming and changing environments. In 2010, 17 weather stations were operating: four in UTCBF, two in UTHF, four in UTCF, one in UTTF, three in ERI, two in ARI, and one in FIWSC.

One weather station in UTCBF, UTHF, UTCF, ERI, and ARI has been designated as Category I since 2011 (UTF, 2012). Since then, measurements of Category I have been reduced to six items: air temperature, air humidity, precipitation, solar radiation, wind velocity, and wind direction. Routine checking and data retrieval are done by a staff member at each regional forest. However, committee members of the Meteorology Division are responsible for maintenance of the equipment. For air temperature and precipitation, additional observation equipment was installed to record backup data. In cases of replacement of equipment or weather station relocation, parallel observations should be conducted for more than one year to allow for future calibration.

Observation data have been published after quality checks and have been available to the public through this website since 2001. A Data paper has been published annually in one of the UTF open access journals, entitled "Miscellaneous Information, The University of Tokyo Forests".

Other measurement items in the weather stations of Category I and the weather stations other than in Category I are classified as Category II, and each regional forest maintains the data by itself. Data publishing of Category II items also depends on each regional forest. However, each regional forest can seek advice for the Category II measurements from the committee members of the Meteorology Division.

Original raw data are stored in three locations: at ERC, ERI, and at each regional forest. In addition, data are backed up to optical disks. Hard copies of old meteorological data are being digitized and stored at each regional forest. Some of the old data from 1989 to 2001 have been published online by the Meteorology Division. The Committee of Research Promotion, The UTF has calibrated the old daily temperature data from some of the regional forests (Kuraji et al. 2012, Tanaka et al. 2013).

How to Use
Use of data is limited to research and educational purposes only.We refuse to use it for other uses.When using these data, you must cite all data papers corresponding to those data.
Contact us
Meteorology Division, Fundamental Data Development Committee,
The University of Tokyo Forests
Graduate School of Agricultural and Life Sciences, The University of Tokyo
1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657 JAPAN
E-mail  kishou-suimon_rep「at sign」uf.a.u-tokyo.ac.jp

Observation Equipment
 Year
 1985  1986 1987   1988  1989
 1990  1991 1992 1993 1994
1995 1996 1997 1998 1999
 2000 2001 2002 2003 2004
2005 2006 2007 2008 2009
2010 2011 2012 2013 2014
2015 2016 2017 2018 2019
2020 2021 2022 2023 2024
2025 2026      

◆Monthly report of meteorological data  
Local UTFs Station Name   Latitude(N)
Longitude(E)
Altitude
Year
(Monthly report set)   
UTCBF Fudago  35°12′00 ″
140°08′35″
206m
1981-1984
1985-2000
2001-2023  2024 2025 2026
Kiyosumi   35°09′35″
140°08′45″
300m
1981-1985
1986-2000
2001-2023  2024 2025 2026
Shinta  35°12′19″
140°06′22″
137m
a 2003-2023 2024 2025  2026
Amatsu  35°07′35″
140°09′11″
15m
1981-1984
1985-2000
2001-2011  Termination   
Godai  35°11′35″
140°06′35″
218m
1985-2000 2001-2011 Termination   
UTHF Maeyama   43°17′47″
142°36′10″
610m
2004-2023  2024 2025 2026
Yamabe  43°13′09″
142°23′01″
226m
1981-1985
1986-2000
2001-2023 2024 2025 2026
Togodamu  43°13′52″
142°35′12″
392m
2004-2011 Termination   
UTCF Koakasawa  35°56′14″
138°48′14″
1200m
2001-2023  2024 2025 2026
Tochimoto  35°56′40″
138°51′47″
760m
1971-1985
1986-2000
2001-2023 2024 2025 2026
Oochigawa  35°54′32″
138°58′43″
610m
1975-2000 2001-2023 2024 2025 2026
Wasabizawa  35°54′44″
138°49′02″
1040m
2011-2023 2024 2025 2026
Kagemori  35°59′00″
139°04′36″
240m 
1975-2000 2001-2011 Termination   
Yatakesawa 35°56′32″
138°49′00″
1030m
  
1980-2000      Termination   
Toubakusawa 35°54′27″
138°48′50″
1170m 
2003-2011  Termination   
UTTF 1st Nursery  35°44′19″
139°32′16″
58m
1986-2000 2001-2023 2024 2025 2026
ERI Shirasaka   35°13′08″
137°09′53″
304m
1971-2000 2001-2023 2024 2025 2026
Higashiyama  35°14′11″
137°09′27″
354m
1971-1976 2001-2023 2024 2025 2026
Ananomiya  35°15′21″
137°06′19″
150m
1971-1982 2001-2023 2024 2025 2026
FIWSC Yamanakako  35°24′27″
138°51′51″
996m
1986-2000 2001-2013 Termination   
ARI Aono  34°41′29″
138°50′19″
105m
1973-1985
1989-2000
2001-2023  2024 2025  2026
Kano  34°38′54″
138°51′12″
10m
1973-1985
1987-2000
2001-2015 Termination   

◆Annual report of meteorological data
Local UTFs Station Name Year   
UTCBF Fudago 1985-2000 2001-2023 2024 2025 2026 
Kiyosumi 1986-2000 2001-2023 2024 2025 2026
Shinta   2013-2023 2024 2025 2026
Amatsu 1985-2000 2001-2011 Termination   
Godai 1985-2000 2001-2011 Termination   
UTHF Maeyama   2004-2023 2024 2025 2026
Yamabe 1986-2000 2001-2023 2024 2025 2026
UTCF   Koakasawa   2001-2023 2024 2025 2026
Tochimoto 1986-2000 2001-2023 2024 2025 2026
Oochigawa 1975-2000 2001-2023 2024 2025 2026
Wasabizawa   2011-2023 2024 2025  
Kagemori 1975-2000 2001-2011  Termination   
Yatakesawa 1980-2000       Termination   
Toubakusawa    2003-2011 Termination  
UTTF 1st Nursery 1986-2000 2001-2023 2024 2025 2026
ERI Shirasaka 1971-2000 2001-2023 2024 2025 2026
Higashiyama 1971-1976 2001-2023  2024 2025 2026
Ananomiya 1971-1982 2001-2023 2024 2025 2026
FIWSC Yamanakako 1986-2000 2001-2013 Termination    
ARI Aono 1989-2000 2001-2023 2024 2025 2026
Kano 1987-2000 2001-2015 Termination