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  

◆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
1985-2000 2001-2020 2021 2022 2023
Kiyosumi   35°09′35″
140°08′45″
300m
1986-2000 2001-2020 2021 2022 2023
Shinta  35°12′19″
140°06′22″
137m
a 2003-2020 2021  2022  2023
Amatsu  35°07′35″
140°09′11″
15m
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
2004-2020 2021   2022 2023
Yamabe  43°13′09″
142°23′01″
226m
1986-2000 2001-2020 2021   2022 2023
Togodamu  43°13′52″
142°35′12″
392m
2004-2011 Termination
UTCF Koakasawa  35°56′14″
138°48′14″
1200m
2001-2020 2021  2022 2023
Tochimoto  35°56′40″
138°51′47″
760m
1986-2000 2001-2020 2021   2022 2023
Oochigawa  35°54′32″
138°58′43″
610m
1985-2000 2001-2020 2021   2022 2023
Wasabizawa  35°54′44″
138°49′02″
1040m
2011-2020 2021   2022 2023
Kagemori  35°59′00″
139°04′36″
240m 
1985-2000 2001-2011 Termination
Yatakesawa 35°56′32″
138°49′00″
1030m
  
1985-2000 Termination
Toubakusawa 35°54′27″
138°48′50″
1170m 
2003-2011  Termination
UTTF 1st Nursery  35°44′19″
139°32′16″
58m
1986-2000 2001-2020 2021   2022 2023
ERI Shirasaka   35°13′08″
137°09′53″
304m
1986-2000 2001-2020 2021   2022 2023
Higashiyama  35°14′11″
137°09′27″
354m
2001-2020 2021   2022 2023
Ananomiya  35°15′21″
137°06′19″
150m
2001-2020 2021 2022 2023
FIWSC Yamanakako  35°24′27″
138°51′51″
996m
1986-2000 2001-2013 Termination
ARI Aono  34°41′29″
138°50′19″
105m
1989-2000 2001-2020 2021  2022 2023
Kano  34°38′54″
138°51′12″
10m
1986-2000 2001-2015 Termination

◆Annual report of meteorological data
Local UTFs Station Name Year
UTCBF Fudago 1985-2000 2001-2020 2021 2022 2023
Kiyosumi 1986-2000 2001-2020 2021 2022 2023
Shinta   2013-2020 2021 2022 2023
Amatsu 1985-2000 2001-2011 Termination
Godai 1985-2000 2001-2011 Termination
UTHF Maeyama   2004-2020 2021 2022 2023
Yamabe 1986-2000 2001-2020 2021 2022 2023
UTCF Koakasawa   2001-2020 2021 2022 2023
Tochimoto 1986-2000 2001-2020 2021 2022 2023
Oochigawa 1985-2000 2001-2020 2021 2022 2023
Wasabizawa   2011-2020 2021 2022 2023
Kagemori 1985-2000 2001-2011  Termination
Yatakesawa 1985-2000 Termination
UTTF 1st Nursery 1986-2000 2001-2020 2021 2022 2023 
ERI Shirasaka 1986-2000 2001-2020 2021 2022  2023
Higashiyama   2001-2020 2021 2022 2023
Ananomiya   2001-2020 2021 2022 2023
FIWSC Yamanakako 1986-2000 2001-2013 Termination 
ARI Aono 1989-2000 2001-2020 2021 2022 2023
Kano 1987-2000 2001-2015 Termination