Test Wiki:CheckUser/ja
CheckUser is a restricted special page that is fully available only to stewards and system administrators. CheckUser allows authorized users to check and view what IP addresses have been used by user accounts. They can also view some other technical information about browsers and user clients. This is not usable by normal users
A log of CheckUser actions is kept privately. Due to the sensitivity of the tool, Checkuser rights will not be granted to any non-stewards or sysadmins except under exceptional circumstances. Administrators, however, can test the tool on their own account and IP address only.