What should I do 180 days after changing my Japan tourist visa to my passport?

What I want to ask is "What should I do if it is 180 days after the date of Japan tourist visa renewal?" Apply for an extension within the time limit specified by the local public security agency.

According to inquiries on the Overseas Visa Help Network, we learned that the stay must exceed the stay period allowed by the visa, and the parties concerned must apply for an extension within the time limit specified by the local public security agency. Being able to apply does not mean that the application will definitely be approved, and all responsibilities that may arise therefrom shall be borne by the applicant. Staying in China beyond the visa period will violate the entry and exit regulations for foreigners and will result in fines and other penalties. Chinese embassies and consulates abroad cannot extend the entry validity period of the visa. If your visa expires, please apply for a new visa. Traveling to China with an invalid visa will result in refusal of entry. Therefore, before leaving for China, please double-check the entry validity period of your visa. Please note that even foreigners holding a valid Chinese visa may be denied entry by the Chinese immigration administration. Once the number of entries has been exhausted, the visa will become invalid; even if the number of entries has not been exhausted, if the entry validity period has expired, the visa will also become invalid. If you need to travel to China again, you must reapply for a visa. Traveling to China with a visa that has exhausted the number of entries will be denied entry. The British visa is valid for two years and has a 180-day stay. The 180-day stay refers to the total number of days of stay. Within two years, you can travel to and from the UK multiple times, but the total number of days of stay cannot exceed 180 days.