From December 21, 2021, onward for the next 1 198 days, kaiyoukan.jp was checked for availability 7 times. Out of all the tests carried out, kaiyoukan.jp was accessible 7 times, the last instance being February 15, 2025, when a code 200 was received. Based on checks made as of April 2, 2025, kaiyoukan.jp did not experience any unavailability incidents. As all of the responses received as of April 2, 2025, show, none of them have an error status. Records indicate a 1.984 seconds kaiyoukan.jp response time on February 15, 2025, compared to 2.217 seconds on average.