Site Policy

Accessibility Policy

Web accessibility verification criteria

This site aims to comply with conformance level AA of “Guidelines for older persons and persons with disabilities—Information and communications equipment, software and services—Part 3: Web content” (hereinafter referred to as “JIS X 8341-3” ) of Japanese Industrial Standards.

1. Scope

The pages under this site are covered.(

2. Exceptions

The following are excluded from the target because it is difficult to correct them.

  • Content that does not have data for correction data (cannot be modified)
  • Part of the images and videos created in the past
  • Services provided externally and associated content
  • PDF data
  • Content aimed at visual effects to share the view of this project

This website provides various content for the purpose of visual effects, regardless of whether it is a still image or a video. Due to the nature of the content, it is technically difficult to comply with all visual content standards, so it is exceptionally out of scope.

3. Goal achievement level

Compliant with Level AA

4. Additional conformance levels

The following criteria for achieving Level AAA will be included in the goals and addressed to the extent possible.

  • 2.1.3: Success criteria for keyboard (without exception) (AAA)
  • 2.2.3: Timing-independent success criteria (AAA)
  • 2.3.2: Success criteria for three flashes (AAA)

Web accessibility verification results

This is to share the results of tests conducted in accordance with JIS X 8341-3: 2016.
The website pages on which the tests have been carried out comply with level AA.

1. Targeted conformance level of web accessibility

Conformance level AA

2. Website pages on which the tests have been completed

Fifteen pages were randomly selected from the domain ( operated by the Tokyo metropolitan government, according to JIS X8341-3: 2016 test implementation guidelines.

List of page URLs on which the tests have been completed (PDF)
3. Exceptions


4. Web content technology used for the website

HTML5, CSS3, and JavaScript

5. Success Criteria Checklist


  • ○: Success criteria are applied to the pages tested
  • −: Success criteria are not applied to the test pages tested


  • ○: The pages tested meet the success criteria
  • −: The pages tested do not meet the success criteria
Sub-clausesGradeSuccess criteriaApplicationConformanceRemarks content that contains only prerecorded audio and media that contains only prerecorded videoNo applicable content of prerecorded audio contentNo applicable content content to prerecorded video content or audio guideNo applicable content of live audio contentNo applicable content guide of prerecorded video contentNo applicable content and relationships sequence characteristics of color controlNo applicable content contrastApplicable to exceptions resizeApplicable to exceptions characters operation movement time limitNo content with a time limit, stop and hide flashes or below the thresholdNo content with flash skip title order purpose in context ways to find page[A1] and labels recognizable focus of page used language changes with on-focus changes with user interface component navigation identification of input errorsNo content with input errors or instructionNo input form content of input error correction methodNo content with input errors of errors in legal commitments, financial transactions, data changes and response transmissionNo content of legal commitments, financial transactions, data changes and response transmission, roles and configurable value that can be interpreted by the program
6. Test period

May 7, 2018 to May 27, 2018

SNS Account Policy

Tokyo Tokyo Official SNS Account Policy