In the time period starting September 7, 2021, and lasting 1 222 days, kosu.co.jp's availability was checked 1 times. As of January 12, 2025, kosu.co.jp was revealed to be offline or facing operational challenges in every evaluation conducted. All inspections conducted reported no instances of non-functionality for kosu.co.jp as of January 12, 2025. Out of the 1 responses that encountered errors, the most recent error, coded as 403, was recorded on September 7, 2021. Against the 2.031 seconds average, kosu.co.jp responded in 2.031 seconds on September 7, 2021.