Data analysis indicates sizen.jp had 2 operability tests done during the 807 days following September 15, 2022. Every assessment conducted confirmed that sizen.jp was either inaccessible or experiencing operational issues as of November 30, 2024. Inspections made as of November 30, 2024, revealed no instances of inoperability on sizen.jp. Code 403, reported on November 18, 2024, represented the latest error out of the 2 responses with errors. Sizen.jp has an average response time of 0.522 seconds, and on November 18, 2024, it was 0.516 seconds.