As of March 2026, British Citizens holding a full UK passport do not need a visa for short-term visits to Japan (up to 90 days) for tourism, business, or visiting friends/family. This "Visa Waiver" agreement remained in place following the post-pandemic reopening and continues to be the standard. However, while a visa is not required, travelers must still comply with entry requirements such as having a valid onward or return ticket and a passport that is valid for the duration of their stay. In 2026, Japan has fully integrated the "Visit Japan Web" system, which allows you to pre-fill your Immigration and Customs declarations online to generate a QR code for faster entry. While the specific "2023" rules you asked about were the first to see the removal of all COVID-related entry restrictions, the current 2026 landscape is even more streamlined, focusing on digital "e-Gates" and biometrics for eligible "Visa Exempt" nationals like those from the United Kingdom.