SoftBank has joined hands with Cisco Systems to begin the deployment of Japan’s first All Optical Network in metro areas.
The first phase of the deployment was completed in Osaka Prefecture in September 2025, and the nationwide rollout is scheduled for completion by 2027. The new All Optical Network eliminates the need for optical-electrical conversions — reducing energy consumption by about 90 percent compared to conventional systems — while delivering large-capacity, scalable data transmission.
Transforming Japan’s Metro Networks
The All Optical Network integrates optical technology throughout metro networks that connect base stations and user access points to the core network. This initiative follows SoftBank’s completion of a nationwide All Optical Network in its core areas in October 2023.
As data traffic soars due to generative AI, cloud services, and next-gen connectivity, SoftBank aims to meet future demand while reducing environmental impact and progressing toward net-zero carbon targets.
Key Features of the All Optical Network
Integration of Optical and IP Networks
SoftBank’s metro infrastructure uses Cisco 400G coherent optical transceivers (OpenZR+), achieving full optical connections without electrical conversions. This design enables long-distance, high-capacity transmission with approximately 90 percent lower energy use.
The network also incorporates SRv6 (Segment Routing IPv6) to enhance scalability, end-to-end management, and flexible route control — overcoming challenges typically seen in all-optical networks.
Simplified, Energy-Efficient Metro Architecture
Cisco’s QSFP-DD Pluggable Open Line System (OLS) — a compact optical amplifier — eliminates the need for bulky rack-mounted amplifiers used in conventional setups.
Paired with SoftBank’s independently developed optical multiplexer (supporting up to 6.4 Tbps), the system achieves more than 90 percent energy reduction, making it compact, cost-effective, and sustainable.
Powered by Cisco’s “Silicon One Q200” Chip
The routers in the new All Optical Network feature Cisco’s Silicon One Q200 chip, which delivers seven times higher switching capacity and consumes about half the energy compared to previous-generation routers.
Executive Insights
Teruyuki Oya, Vice President, Head of Mobile & Network Division, Technology Unit, SoftBank, said the initiative addresses growing data demands driven by AI and next-generation technologies while combining IP and optical technologies to deliver energy efficiency, flexibility, and resilience for Japan’s communications foundation.
Vish Iyer, Senior Vice President, APJ Service Provider, Cisco, said the partnership focuses on delivering a scalable, environmentally friendly network that supports Japan’s digital transformation and AI-driven growth, helping build a more efficient and connected future for businesses and citizens.
Driving Japan’s Sustainable Digital Future
By combining optical and IP innovations, SoftBank and Cisco are setting a new benchmark for energy-efficient, high-performance network architecture. The All Optical Network will play a pivotal role in supporting AI applications, cloud expansion, and the transition to Beyond 5G/6G, while helping Japan achieve its sustainability goals.
