Over the past 1 073 days, starting from December 15, 2021, there were 2kenkyusha.co.jp's availability checks performed. Kenkyusha.co.jp was online 2 times out of all checks performed, as shown by the code 200 response on the latest test conducted on November 18, 2024. As of November 23, 2024, all checks of kenkyusha.co.jp confirmed that there were no instances of inaccessibility. As of November 23, 2024, there were no reported errors in any of the responses based on the replies received. Kenkyusha.co.jp's response time was recorded at 2.617 seconds, with an average of 4.112 seconds, as of November 18, 2024.