Zener.co.jp's availability has been tested 3 times during the last 2 173 days, beginning February 5, 2019. Zener.co.jp was up a total of 3 times in the tests conducted, most recently returning status code 200 on January 3, 2025. As of January 17, 2025, testing indicates that there had been no instances of inoperability for zener.co.jp. Based on the obtained replies, it can be concluded that there were no errors in any of the responses as of January 17, 2025. Averaging 1.440 seconds, zener.co.jp's response time on January 3, 2025, was 1.551 seconds.