Explore our cost-effective, high-accuracy inertial navigation systems engineered to thrive in Tokyo's complex urban canyons and industrial zones.
Tokyo, the beating heart of Japan's technological and economic prowess, stands at the absolute forefront of the global robotics, automation, and smart transportation revolution. However, the unique architectural and geographical layout of the Greater Tokyo Area presents unprecedented challenges for high-precision positioning. The density of towering skyscrapers in commercial hubs like Shinjuku, Shibuya, and Otemachi creates what engineers refer to as "urban canyons." In these environments, traditional Global Navigation Satellite System (GNSS) signals are severely degraded due to multi-path interference or blocked entirely by steel and concrete structures.
Moreover, Tokyo's highly complex subterranean transport network, including the intricate Tokyo Metro and Toei Subway lines, demands positioning technologies that operate completely independent of satellite visibility. To address these challenges, industrial developers, autonomous vehicle manufacturers, and logistics operators are turning to Inertial Navigation Systems (INS). By integrating high-frequency IMU sensors with advanced multi-source data fusion algorithms, INS positioning provides continuous, reliable, and highly accurate trajectory tracking even in completely GPS-denied environments.
While the demand for high-precision positioning is surging, the high cost of military-grade Fiber Optic Gyroscopes (FOG) and premium Ring Laser Gyroscopes (RLG) has traditionally limited their adoption in commercial applications. Tokyo's competitive robotics and autonomous delivery startups require a new breed of cheap INS positioning manufacturers and factories that can deliver high-precision sensor units at scale without compromising on reliability. By optimizing production processes, utilizing advanced MEMS (Micro-Electro-Mechanical Systems) technologies, and streamlining supply chains through strategic hubs like Hong Kong, manufacturers are now able to offer industrial-grade INS solutions at a fraction of the traditional cost, paving the way for mass commercialization across Japan.
Connecting the World Through High Accuracy Navigation Technology
Poseidon International Group (Hong Kong) Limited is a global enterprise dedicated to delivering high-quality products and professional services. Based in Hong Kong, we have established long-term, stable, and efficient partnerships with numerous suppliers worldwide, ensuring competitive pricing and superior product quality for demanding markets like Tokyo.




Striving to provide satisfactory products and services to customers from all walks of life.
The positioning and navigation landscape in Japan is undergoing a major paradigm shift driven by several macroeconomic and technological trends:
Our cheap INS positioning systems are optimized for several high-demand applications across the Tokyo metropolitan area:
Autonomous delivery carts navigating the crowded sidewalks of central Tokyo must deal with narrow pathways, pedestrian obstacles, and tall buildings that block GPS signals. By integrating our low-drift INS systems, these robots can maintain precise lane-level positioning, ensuring safe navigation around busy intersections and pedestrian crossings without losing their path.
The Port of Tokyo is one of the busiest marine gateways in Asia. Automating container yard cranes, autonomous straddle carriers, and tugboats requires highly resilient positioning. Our vessel-mounted communication and positioning systems (such as the Diver-101) are designed to withstand harsh maritime environments while providing highly stable attitude and positioning data, optimizing container loading cycles.
Tokyo's underground utility tunnels, sewer lines, and subway tracks require regular structural inspections. Drones and robotic crawlers operating in these fully enclosed subterranean environments cannot receive any GNSS signals. Our high-precision integrated INS970 systems provide the zero-drift, high-rate attitude data needed to map underground assets accurately, enabling preventive maintenance without service disruptions.
Delivering high-performance, customized solutions for complex engineering challenges.

We specialize in the independent research, design, and production of fiber optic gyroscopes (FOG), inertial navigation systems (INS), attitude and control systems, autonomous driving systems, and intelligent control systems for unmanned equipment. By integrating industry-specific requirements, we have made significant technological advancements in digitalization, automation, and intelligence, securing multiple technical patents.

Our core team comprises seasoned experts with extensive backgrounds in aerospace and inertial navigation. We have successfully tackled critical technological challenges in high-precision GNSS-free navigation, laser measurement, integrated navigation, multi-source data fusion, and precise positioning—areas that were once major bottlenecks in the industry.

Our products are smaller in size, higher in accuracy, and more stable in performance, featuring long-term dynamic auto-calibration with zero-drift operation. They are widely adopted in scientific research, industrial control, intelligent unmanned systems, high-precision detection, and metrology. Having passed rigorous validation in aviation, marine, mining, and railway applications, our solutions have filled key technological gaps.

We operate a state-of-the-art manufacturing facility of over 6,000 square meters in mainland China, equipped with advanced R&D, production, and testing infrastructure, enabling large-scale production and timely delivery. Our network of subsidiaries, offices, and spare parts warehouses ensures prompt technical support and after-sales service for our Tokyo clients.
As a leading manufacturer supplying the Tokyo market, we bridge the gap between high performance and affordability. Our systems are specifically engineered to solve the core issues faced by Japanese system integrators:
The primary limitation of low-cost inertial sensors is bias drift over time. Our engineering team has resolved this bottleneck by implementing long-term dynamic auto-calibration algorithms. By continuously modeling sensor errors in real-time using temperature, vibration, and auxiliary velocity inputs (such as odometer or Doppler velocity logs), our INS modules maintain high precision even during extended periods of GNSS signal loss. This is critical for autonomous shuttles operating in Tokyo's multi-layered transit corridors.
Tokyo's robotics developers place a premium on space. Whether designing micro-drones for indoor inspections or compact delivery robots, every millimeter counts. Our manufacturing facility utilizes advanced multi-chip module packaging to produce some of the smallest INS units in the industry. This compact design allows easy integration into existing hardware configurations without altering the vehicle's payload capacity or aerodynamic profile.
With Tokyo's dense 5G network, overhead power lines for trains, and high concentration of electronic devices, electromagnetic interference (EMI) is exceptionally high. Our INS units feature robust metallic shielding and differential signal routing to prevent signal corruption, ensuring reliable operation in high-interference industrial environments like automated manufacturing plants and rail yards.
Why global partners choose Poseidon International Group
Guided by the vision of "Connecting the World through Inertial Navigation", we strive to push the boundaries of navigation technology, aiming to become a leading integrated solutions provider with a broad product portfolio and advanced competencies.
Browse our complete range of high-precision inertial navigation systems and communication modules optimized for Tokyo's leading industrial sectors.