Using the content on this website
Legal Notice
- The Ministry of Environment (MOE) makes every effort to ensure that the information posted on its "Heat Illness Prevention Information" website ("this website") is accurate. However, MOE does not guarantee its content, which may be incomplete due to network or system problems.
- In addition, MOE assumes no responsibility for any actions taken by users in reliance on information on this website.
- The forecast values of WBGT (Heat Stress Index) are calculated using a unique method on the basis of weather forecast results by the Japan Meteorological Agency, and the method has limitations. The actual WBGT value may be different from forecast values because of a sudden change in weather conditions. Further, even when the WBGT is low, you may suffer heat illness depending on the surrounding environment, your physical condition on the day, or what you are doing outdoors. Please check temperature forecasts issued by the Japan Meteorological Agency and take appropriate action, paying close attention to your own condition.
Terms of Use
1. Copyright Policy
Unless otherwise specified, the copyright of information posted or transmitted on this website ("Content") shall belong to MOE. The Content may be used under the terms and conditions of use compliant with "Public Data License (Version 1.0)" ("PDL1.0") available at https://www.digital.go.jp/resources/open_data/public_data_license_v1.0 to the extent such use does not infringe on any copyrights or proprietary notices in the Content, if any.
Note: This document is for reference only. Please refer to the Japanese version below for the official document.
(Japanese version) Public Data License (Version 1.0) (PDF/203KB)
For the applicability of PDL1.0 to site-specific content, such as examples of source citations unique to this website and Content to which these rules do not apply, please see "2. Important note on Public Data License (Version 1.0)".
2. Important note on Public Data License (Version 1.0)
1.1. Source citation
1. The user must cite the source when using “This Content”. Sources should be cited in the following manner for how to cite the sources, such as by replacing the name of the information provider and its URL. If the URL link can be used as a source, the user can also add the link to the relevant text in the parentheses. In addition, if examples of source citations are provided in "Important note on Public Data License (Version 1.0)" related to “This Content”, please refer to those examples instead of the examples below.
(Examples of source citation)
Source: Ministry of the Environment Heat Illness Prevention Information website (URL of the relevant page)
Source: XX Survey (Ministry of the Environment) (URL of the relevant page) (accessed on year/month/day)
2. If the user has edited “This Content” for use, you must include a statement expressing that “This Content” has been edited and the name of entity, in addition to the abovementioned source citation. Besides, if examples of source citations are provided in "Important note on Public Data License (Version 1.0)" related to “This Content”, sources should be cited in those manner instead of the examples below. But not in any way making public or using edited information in a format that may be misconstrued as if national government or the relevant ministries (This also applies if “This Content” is provided by the local government) has just created and unedited by anyone else.
(Example of citation when using edited “This Content”)
Created by editing the XX Survey (Ministry of the Environment) (URL of the relevant page)
Created by Company YY based on XX Survey (Ministry of the Environment) (URL of the relevant page)
1.4. “This Content” where “This Terms of Use” does not apply
“This Terms of Use” herein does not apply to the following Content. If there is any Content that clearly states that different terms of use apply, it is described in "Important note on Public Data License (Version 1.0)".
1.Symbol mark, Logo, and Character Design which represent the organization or specific business.
2.Content where other terms of use apply with concrete and rational reason.
・ Email delivery service (Heat Stroke Alert delivery service, Heat Stress Index (WBGT) email delivery service, and Heat Stress Index (WBGT) electronic information provision service)
Links to the this website
As a rule, users are not required to ask permission to link to pages on this website.
However, please observe the following points. Linking to particular Content should also be conducted observing these points:
- Please state explicitly that the link is to this website; and
- Please do not link to this website within the window or frame of another website.
The following graphic banner is available for use.
Privacy Policy
1. Basic policy
The Ministry of Environment (MOE) collects information on users of its website within the scope required for optimal provision of services. All information collected is used appropriately within the scope of the purposes specified below.
2. Scope of information collected
a. This website collects information on Internet domain names, IP addresses, access status and other data in the form of access logs.
b. Cookies are used on some of the pages of this website. However, MOE does not use cookies to collect information that would allow identification of individual users. Browsers can be set to disable cookie usage, which does not affect access to the website.
3. Purposes of use
a. Information collected as detailed in Item 2)-a is used to provide optimal services on this website.
b. Information collected as detailed in Item 2)-b is used to improve accessibility to this website.
4. Limitations on use and provision
MOE does not use collected information for purposes other than those specified in Paragraph 3) or provide such to third parties unless information disclosure is required in association with laws or ordinances, violations such as unauthorized access or threats, or other special circumstances. However, statistically processed information on access to this website, on user information and so forth may be published.
5. Measures to ensure security
MOE is taking the measures necessary to manage acquired information appropriately to prevent the leakage, loss or destruction of acquired information.
6. Scope of application
This privacy policy applies only to this website.
7. Other
MOE may revise its privacy policy from time to time. Any future revisions will be announced on this website.

