| Date | IP Address |
| 2019-10-12 | 52.199.132.126 (ClassC) |
| 2020-05-21 | 52.199.202.198 (ClassC) |
| 2020-05-21 | 52.196.226.0 (ClassC) |
| 2023-07-24 | 54.238.96.40 (ClassC) |
| 2024-11-17 | 52.197.237.33 (ClassC) |
| 2025-04-19 | 52.194.9.100 (ClassC) |
| 2025-09-12 | 3.115.41.242 (ClassC) |
| 2026-03-04 | 54.178.47.172 (ClassC) |
| Date | Domain | IP |
| www.yutaka-isesaki.com | 2024-09-30 | 54.199.53.166 |