Tokyo VPN Speed Monitor: A Longitudinal Open Dataset of VPN Performance Metrics in Japan

Virtual Private Networks (VPNs) have become essential tools for internet privacy, security, and circumventing geographic restrictions. We present the Tokyo VPN Speed Monitor dataset, a comprehensive longitudinal collection of VPN performance metrics measured from Tokyo, Japan.

The dataset encompasses 15 major commercial VPN services with automated measurements conducted every 6 hours from December 9, 2025 to January 9, 2026 (approximately 32 days). Key metrics include download speed, upload speed, ping latency, stability scores, and daily pricing information.

Project Website: https://www.blstweb.jp/network/vpn/tokyo-vpn-speed-monitor/

Data Repositories:
- Harvard Dataverse: https://doi.org/10.7910/DVN/OMC9A4
- Zenodo Dataset: https://doi.org/10.5281/zenodo.18091751
- Zenodo Paper: https://doi.org/10.5281/zenodo.18207135
- IEEE DataPort: https://doi.org/10.21227/9ej5-dp09
- Source Code: https://github.com/hmy0210/vpn-stability-ranking

Keywords: VPN, network performance, speed test, latency, Japan, Tokyo, open data