Over the period of 2 140 days starting from February 8, 2019, sei-ken.co.jp has been checked for availability a total of 3 times. According to all checks done as of December 19, 2024, sei-ken.co.jp was unavailable or facing other problems. Out of the inspections done, sei-ken.co.jp was unreachable 100.00% of the time, totaling 3 occurrences, with the latest instance occurring on January 2, 2022. The responses that had been received as of December 19, 2024, showed that no response had an error status. Against an average of 0.001 seconds, — seconds was sei-ken.co.jp's response time on January 2, 2022.