Answered by John Doe
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Mar. 03, 2020 09:36
Your description is quite unclear. Are you talking about the temporary residence registration at a police station? Ordinary police don't handle visa extensions and the National Immigration Administration office is the one you are looking for. Keep in mind that, when applying for an extension, the NIA will need to see the temporary residence registration form given to you by the police station. If you cannot fidn the form then you need to get a new one at the police station with which you are currently registered.
Also, an extension will void whatever multiple-entry visa you have.