Sign Up

Required

You can use only English letters and numbers. The length must be between 3 and 16, inclusive.
The password must contain at least 6 characters and must contain both English letters and numbers at least once respectively.
@
▶About Personal Information
Purpose of Use
  • We will use User's Personal Information solely for the following purposes:
  1. To provide the Services as well as guidance and information in relation thereto;
  2. To customize Services, information on the Service pages and the distribution of advertising based on the age, occupation, gender, hobbies and preferences, etc. of Users;
  3. To improve the Services, and for the development of new services, etc.;
  4. To prevent the usage of Services in a manner that violates the Terms of Use; or
  5. To create statistical data about the Services that are processed in a manner so that individuals cannot be identified.
Entrusting of personal information
  • We may entrust the handling of personal information to a third party. In this case, we will supervise that third party as necessary and as appropriate to ensure that the entrusted personal information is securely managed.
Provision of personal information to third parties.
  • We will never provide your personal information to a third party without your consent other than when based on laws and regulations.
Requests for the disclosure, etc. of your personal information
  • You may request that we notify you of the purpose of use of your personal information, disclose the contents of said information, make corrections or additions to or delete the contents of said information, discontinue using or providing said information, or erase said information (collectively referred to as requests for the "disclosure, etc." of your personal information). We accept requests for the disclosure, etc. of personal information in our possession via our "Personal Information Complaints and Enquiries Desk" (details provided below).
Important notes concerning the input of personal information
  • Please note that we may be unable to provide the optimal answers if you do not provide all the necessary information.
Personal information protection manager
  • AtCoder Inc. Director Kensho Aoki support@atcoder.jp
Personal Information Complaints and Enquiries Desk
  • AtCoder Inc. Complaints and Enquiries Desk E-mail: support@atcoder.jp

You shall be deemed to have agreed all the Terms of service when you sign up.

2025-04-15 (Tue)
22:27:32 +00:00