Taihei

Overview

Taihei is a trans-Pacific submarine cable system connecting Japan and the United States across approximately 7,000 kilometers of the Pacific Ocean. Scheduled to be ready for service in 2027, Taihei is wholly owned by Google. The cable provides a direct link between Takahagi, Japan, and Kapolei, Hawaii, forming a critical infrastructure component in one of the world's most active digital corridors. Its deployment underscores the increasing demand for high-capacity, low-latency connectivity between Asia and North America, driven by cloud services, data exchange, and global internet traffic.

As a private cable system, Taihei is designed to support Google's internal network and cloud operations, ensuring robust and scalable connectivity. Its route bypasses traditional multi-segment designs, offering a direct Japan-to-Hawaii connection that reduces latency and simplifies network management. The system's planned readiness in 2027 will add to the growing number of cables supporting trans-Pacific data flows.

Route and Landings

Taihei spans the Pacific Ocean, landing at Takahagi in Japan and Kapolei in the United States. Takahagi, located in Ibaraki Prefecture northeast of Tokyo, is a coastal city with a growing role in Japan's digital infrastructure. Its selection as a landing point reflects its strategic position near major metropolitan and industrial hubs while avoiding congestion at more traditional landing sites like Chiba or Shima.

On the U.S. side, the cable lands in Kapolei, situated on the western coast of Oahu, Hawaii. Kapolei serves as a key hub for submarine cables in the central Pacific, offering onward connectivity to the continental United States and other Pacific islands. Hawaii's geographic position makes it a natural relay point for trans-Pacific systems, and Kapolei has emerged as a preferred landing site due to its infrastructure and proximity to Honolulu. The direct Japan-to-Hawaii route avoids intermediate landings, optimizing the cable's performance and reliability.

Ownership and History

Taihei is owned entirely by Google, a major player in the development of private submarine cable systems. Over the past decade, Google has invested heavily in proprietary cables to support its global network and cloud services, ensuring secure and high-performance connectivity for its operations. Taihei represents another step in Google's strategy to control key infrastructure in critical regions, reducing dependency on shared systems and enhancing its ability to meet growing demand for data services.

The cable’s development aligns with Google's broader efforts to expand its infrastructure footprint in the Asia-Pacific region. By connecting Japan directly to Hawaii, Taihei complements other Google-owned systems, creating a more resilient and diverse network. The cable's planned readiness in 2027 reflects a multi-year process of design, permitting, and construction, typical for large-scale submarine cable projects.

What Our Measurements Show

Our live monitoring of Taihei includes 65 measured corridors, providing insights into the cable's performance. The best recorded round-trip time (RTT) is 10 milliseconds, with an average RTT of 55 milliseconds. These measurements reflect the system's efficiency, particularly for a route spanning 7,000 kilometers. The low latency is a result of the cable's direct path between Japan and Hawaii, reducing the number of intermediate hops and associated delays.

Compared to other trans-Pacific systems, Taihei offers competitive performance, particularly for latency-sensitive applications such as financial transactions, video streaming, and cloud computing. Its direct route and private ownership ensure consistent quality and reliability, making it a valuable asset for global connectivity. The cable's performance metrics highlight its potential to serve as a backbone for high-speed data exchange between Asia and North America.