About the website

Web accessibility policy

1. Policy

We aim to conform with a level AA of JIS X 8341-3 "Guidelines for older persons and persons with disabilities – Information and communications equipment, software and services – Part 3: Web contents" (hereinafter referred to as "JIS X 8341-3").

(1) Scope

All the pages under the Sewerage Ledger Website of Tokyo Metropolitan Government Bureau of Sewerage (http://www.gesuijoho.metro.tokyo.jp/semiswebsystem/)

(2) Exception

  1. 1. Any contents which do not have modification data (can not be modified).
  2. 2. Part of images or videos created in the past.
  3. 3. Externally provided services or accompanying contents.
  4. 4. PDF data

As for attached files such as PDF files, we will consider the response guideline after the translation of the W3C Working Group Note "PDF Techniques for WCAG 2.0" is officially released in the Working Group of the Web Accessibility Infrastructure Committee of the Info-communication Access Council. However, at this point in time, we have set the goals regarding PDF data as follows and will develop these sequentially.

2. Web accessibility verification result

We tested based on JIS X 8341-3: 2016 and officially announced the result. Web pages on which the test was conducted were in conformity to the level AA.

1) Tested web pages

A total of 11 web pages (http://www.gesuijoho.metro.tokyo.jp/semiswebsystem/) operated by the Tokyo Metropolitan Government Bureau of Sewerage were tested based on JIS X 8341-3: 2016 test guidelines.

List (26.5 KB)

Accessibility criteria checklist

A total of 11 web pages (http://www.gesuijoho.metro.tokyo.jp/semiswebsystem/) operated by the Tokyo Metropolitan Government Bureau of Sewerage were tested based on JIS X 8341-3: 2016 test guidelines.

JIS Checklist (87.1KB)

Multilingual language policy

1. English

This website has English web pages for foreigners to be able to find information offered by Tokyo Metropolitan Government and understand its efforts. Click "English" located at the top right of the webpage to display the English site.

Privacy policy

This website collects personal information from its users to the extent necessary to smoothly run its services, including providing information on its web pages and receiving users' opinions etc. In collecting, using, and handling personal information, we take proper measures as described below, based on the "Tokyo Metropolitan Ordinance on the Protection of Personal Information" (Ordinance No. 113 of December 21, 1990; hereinafter referred to as "the Ordinance") and endeavors to provide a website which everyone can use with peace of mind.

Definition of personal information

"Personal information" refers to addresses, names, phone numbers, email addresses, and other personally identifying information provided via use of this website to the Tokyo Metropolitan Government.


This privacy policy applies only to this website and does not apply to sites linked to by this website. The handling of information on the linked websites is the responsibility of the respective organizations.

Restrictions on the use of personal information

We use personal information provided (registered) by users only for the purposes identified in advance. The relevant implementing bodies* will never use this personal information outside the purposes of the collection, nor will this personal information be provided to any parties other than the implementing bodies, unless otherwise specified by the Ordinance.However, statistical data on user attributes, etc., obtained through the operation of this website, may be publicly published, but this data will not contain personal information.

"Implementing bodies" refers to those that handle the relevant personal information, namely the Governor of Tokyo, administrative commissions, the directors of public enterprises, Fire Chief, and the directors of administrative bodies stipulated by Tokyo Metropolitan Government regulations.

Management of personal information

The webmaster will place strict controls on collected personal information and take appropriate measures to prevent leakage, misappropriation and falsification etc. of said information. In addition to this, we may outsource the operations of the website to third parties that will also take appropriate measures in the same manner.

About users' information that does not contain personally identifiable information

We automatically collect information such as your Internet domain name, IP address, browser settings (hereinafter referred to as the "user information").We will collect and use user information only to the extent that such information is used for the improvement of the usability of this website. We may, however, disclose information such as statistically processed information on website access and browser settings etc.

Technical matters

Please use the following operating systems (OS) and browsers etc. to use the services on this website.

  1. 1. OS: Japanese Windows 8.1 and 10.
  2. 2. Browser: Mozilla Firefox (verified with 79), Google Chrome (verified with 84) and Microsoft Edge (verified with 84). *Our services may not be used properly by using other OSs, browsers or combinations of OS and browser.
  3. 3. Adobe Acrobat Reader DC or later is recommended to view PDF files.
  4. 4. Please allow cookies when using our services on this website. If cookies are not allowed in your browser, our services may not be able to be used properly. In this case, change the setting to allow cookies.
    Please allow cookies when using our services on this website. If cookies are not allowed in your browser, our services may not be able to be used properly. In this case, change the setting to allow cookies.
  5. 5. In the case that you still have difficulty using the services on this website, deleting your browsing history may assist. In the case of the Japanese version of Microsoft Internet Explorer 11.0, delete your browsing history by the following procedure, and you may become able to use the website normally.

    After deleting your browsing history, click on [Refresh] button or press [F5] key on the keyboard to reload the page.

Legal matters

1. Disclaimers

There is no guarantee of the completeness or accuracy of any information provided on this website. This information may be changed without notice or warning. The administrators and owners of this website accept absolutely no responsibility for any damage that may occur directly or indirectly due to the use of the information or content on this website.

2. Prohibitions

The following activities are prohibited in the use of this website:

  • *Any activity that hinders or creates obstructions to the operation of this website.
  • *Any activity that causes or may cause inconvenience, loss, or violations of privacy to the Tokyo Metropolitan Government, the users of this website, or other third parties.
  • *Any activity that violates or may violate public order and morality.
  • *Any activity that violates a law, ordinance, or regulation.
  • *Any other activity deemed inappropriate by the Tokyo Metropolitan Government.

3. Applicable laws and court of jurisdiction

Interpretation and application of this site policy and all use of this website shall adhere to the laws of Japan unless otherwise specified. All disputes arising in connection with the use of this website shall be subject in the first instance to the exclusive jurisdiction of the Tokyo District Court.

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