Tokyo VPN Speed Monitor Dataset

This dataset contains 1245 automated measurements of VPN performance from Tokyo, Japan, collected over a 3-week period in December 2025. Key Features: - 15 VPN providers tested - Measurements every 6 hours (4 times per day) - Time-series data from early December 2025 to December 30, 2025 - Statistical analysis with Coefficient of Variation (CV) for stability assessment - Total duration: 21 days Data Collection Period: - Start: Early December 2025 - End: December 30, 2025 - Total measurements: 1245 records Data Format: The CSV file contains the following columns: - timestamp - Measurement datetime - vpn_name - VPN provider name - download_speed - Download speed in Mbps - upload_speed - Upload speed in Mbps - latency - Latency in milliseconds - cv - Coefficient of Variation (percentage) Methodology: Automated testing using Google Apps Script deployed on Google's free tier infrastructure. All measurements are performed from Tokyo, Japan, with testing occurring every 6 hours around the clock. Statistical analysis includes Coefficient of Variation (CV) calculation for stability assessment. System uptime: 99.8%. Operating cost: $0/month. Live System: - Dashboard: https://www.blstweb.jp/network/vpn/ - Source Code: https://github.com/hmy0210/vpn-stability-ranking - VPN Leak Detection Tool: https://www.blstweb.jp/network/vpn/security-diagnosis/ Use Cases: - VPN performance analysis and comparison - Network performance research - Time-series data analysis and forecasting - Educational purposes in networking courses - Benchmarking studies License: MIT License - Free to use for any purpose including commercial applications, research, and education.