Since September 2, 2021, the report indicates opac.ndl.go.jp was checked 2 times for accessibility over a 1 180 day period. With the last time on March 14, 2023, when a code 200 was returned, opac.ndl.go.jp was up 2 times out of all the checks conducted. Opac.ndl.go.jp had zero downtime according to all assessments made as of November 25, 2024. According to replies obtained, no errors were encountered in responses as of November 25, 2024. Records indicate opac.ndl.go.jp had an average response time of 3.212 seconds, while on March 14, 2023, it responded in 2.874 seconds.