A metropolitan quantum key distribution (QKD) network, the Tokyo QKD Network, was demonstrated, integrating various QKD schemes to enable secure TV conferencing over 45 km, stable long-term operation, and secure mobile phone applications. The network, built on the Japan Giga Bit Network 2 (JGN2plus), includes four access points connected by commercial fibers with significant loss and environmental susceptibility. Six QKD links were established between these access points using different protocols, including decoy-state BB84, DPS-QKD, and BBM92. The network employed a three-layer architecture based on key relay via trusted nodes, with a key management layer for secure key distribution and a communication layer for encrypted data transmission. The Tokyo QKD Network demonstrated secure key rates of up to 81.7 kbps over 45 km, with a secure bit rate of 304 kbps over a 24-hour period. The network also showed the ability to detect and respond to eavesdropping attempts, ensuring secure communication. The system was tested for stability and security, with secure key rates maintained over several days. The network demonstrated secure video conferencing, secure mobile phone communication, and the ability to reroute QKD links in case of attacks. The Tokyo QKD Network represents a significant advancement in QKD technology, providing a secure and reliable communication infrastructure for high-end security applications.A metropolitan quantum key distribution (QKD) network, the Tokyo QKD Network, was demonstrated, integrating various QKD schemes to enable secure TV conferencing over 45 km, stable long-term operation, and secure mobile phone applications. The network, built on the Japan Giga Bit Network 2 (JGN2plus), includes four access points connected by commercial fibers with significant loss and environmental susceptibility. Six QKD links were established between these access points using different protocols, including decoy-state BB84, DPS-QKD, and BBM92. The network employed a three-layer architecture based on key relay via trusted nodes, with a key management layer for secure key distribution and a communication layer for encrypted data transmission. The Tokyo QKD Network demonstrated secure key rates of up to 81.7 kbps over 45 km, with a secure bit rate of 304 kbps over a 24-hour period. The network also showed the ability to detect and respond to eavesdropping attempts, ensuring secure communication. The system was tested for stability and security, with secure key rates maintained over several days. The network demonstrated secure video conferencing, secure mobile phone communication, and the ability to reroute QKD links in case of attacks. The Tokyo QKD Network represents a significant advancement in QKD technology, providing a secure and reliable communication infrastructure for high-end security applications.