Over the 1 530 days starting September 8, 2021, ken-on.co.jp underwent 9 functioning checks, according to the data. Throughout the course of all assessments, ken-on.co.jp has been up 9 times, with the most recent code 200 response occurring on November 5, 2025. As of November 17, 2025, conducted checks indicate that there were no instances of ken-on.co.jp being unavailable. It was noted from the responses received that there were no error statuses recorded as of November 17, 2025. In contrast to the average of 4.885 seconds, ken-on.co.jp's response time on November 5, 2025, was 3.400 seconds.