Tokyo VPN Speed Monitor Dataset

This dataset contains 1950+ automated measurements of VPN performance from Tokyo, Japan, collected 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
- Statistical analysis with Coefficient of Variation (CV) for stability assessment

Data Collection Period:
- Start: Early December 2025
- Total measurements: 1950+ records

Data Format:
The CSV file contains the following columns:
- Timestamp
- VPN Service
- Download (Mbps)
- Upload (Mbps)
- Ping (ms)
- Instant Stability
- Reliability (%)
- Overall Score
- Rank

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/tokyo-vpn-speed-monitor/
- 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.