Programming Field

Privacy Policy

NOTE: Despite this page is written in English, using non-Japanese languages are not supported (see 'Additions' section).

日本語版: プライバシーポリシー

Personal information collection

In this web site, personal information is not collected for the purpose of identifying individuals, except for 'Contact' page (see below). Users or visitors of this web site can use anonymous or nickname for their "user information" if the personal information is required by contents in this web site.

For 'Contact' page, the valid email address is required because the administrator may reply to the submission. The email address is used only for replying; the administrator will not disclose or provide it to third parties without users' permission, except under the law.

While visitors' access information, such as IP address, will be recorded on the server, identifying individuals is unable from those information, and the information will also never be disclosed or provided to third parties, except under the law.

About cookies

'Cookie' is one of the temporal information saved on the browser. In this web site, except for advertisements (see 'About advertisements' section), cookies or equivalent functions are used for following reasons:

  • for purpose of extending features, such as for storing contents, including works, artifacts, temporal data, and/or etc. (by some tools running on the browser)
    • These stored or saved data will not be sent to other servers, except for the case that this web site moves to another server.
  • for purpose of collecting and analyzing user experiences and improving this web site (by using Google Analytics)
    • Anonymous data will be sent to the server for analysis.

Users can disable cookies or equivalent functions by changing browser setting, by using private-mode of browsers, or etc. Users can also change cookie settings by clicking 'Cookie Settings' button in About page.

About advertisements

In this web site, some advertisements may be displayed. Cookie is used for ad serving, and advertisements are delivered based on past access information to this web site.

Google and third party vendors are delivering advertisements by using advertising cookies, Search Ads 360, that enable Google and third party vendors to serve ads to your users based on their visit to your sites and/or other sites on the Internet.

Users can opt out of personalized advertising by visiting Google's Ads Settings. Alternatively, you can direct users to opt out of a third-party vendor's use of cookies for personalized advertising by visiting

For EU users, the personal information is not used for advertising (this means that the personalized advertising is disabled).

For more information about Google's advertisements and their use of cookie, please visit Privacy & Terms by Google.


Regarding problems that occurred on this web site, the web site and the administrator will not be responsible at all unless the root cause is a bug (*) in the web site's program. It is applied for problems such as damages to not only user-generated contents but also personal information.

(*) The bug does NOT include the problem caused by usage method deviating from the original purpose and intention of the program. Please make sure to use the program according to the explanation that comes with it.


  • Most contents in this web site is written in Japanese. You can use translation services to read by another languages, but this web site is not responsible for the translations.
    • 'Contact' page is also intended for use in Japanese, so the response to non-Japanese contact/message may be delayed or declined. Using non-Japanese languages, especially languages with non-Latin script, may also cause unexpected behaviors.
  • For more information about this web site, see 'About' page.