Wireless communication network supports high data volumes and improves digital experience (DX) for employees at Nihonkaisui

At Nihonkaisui’s Ako Plant, daily production of 650 tons of salt depends on reliable operations across a large, corrosion-prone environment. The plant moved toward wireless connectivity to create a more stable foundation for factory DX, support real-time uploads of high-volume equipment data and make digital tools more useful to employees. A cost-effective Managed Private 5G service covered network design, construction and operations, with licensing support and a private 5G lab for connectivity testing and solution development.
Wide view of a coastal salt manufacturing complex with salt stockpiles, processing equipment, pipelines and workers, showing the scale of the connected industrial environment
650 tons
Daily salt output at Ako Plant.
Real-time data
Equipment readings uploaded at scale.
Four signals
Temperature, pressure, flow and vibration.
Second plant
Private 5G deployment expanded.
Two salt plant technicians inspect processing equipment with a rugged tablet and physical gauge beside stainless pipework and a salt conveyor
Wireless communication network supports high data volumes and improves digital experience (DX) for employees at Nihonkaisui

The transformation connects plant equipment and frontline teams through a managed private network designed for industrial reliability. It turns difficult-to-scale data collection into a practical operating capability, while giving employees a more direct role in the plant’s digital agenda.

From a difficult physical environment to connected, data-ready operations.
Objectives
Establish a wireless communication network able to advance factory DX without compromising stable salt production. The initiative needed to combine carrier-grade reliability with cost discipline, connect equipment across the large Ako site, support high-volume uploads of temperature, pressure, flow-rate and vibration data, and provide end-to-end support for the private 5G licensing process.
Opportunity
With private 5G deployed at a second plant and a dedicated lab available for connectivity testing and solution development, Nihonkaisui has a grounded path to explore additional factory DX use cases. The opportunity is to reuse what has been learned at Ako, validate each use case in a controlled environment and extend reliable wireless access where it creates clear operational value. The scale, roadmap and business case for any further rollout require confirmation.
Making industrial connectivity work across a large, corrosive site

The Ako Plant needed a wireless platform that could fit a physically demanding production environment and the economics of factory operations.

Key Challenges
A field engineer walks through a large salt production site with distant processing buildings, conveyors and storage areas, illustrating the challenge of sitewide wireless coverage
1. Sitewide reach:
The plant’s large footprint required coverage capable of connecting equipment and employees across dispersed operational areas.
A maintenance technician inspects salt residue and corrosion around industrial conduit and a sealed wireless enclosure in a salt processing plant
2. Corrosion-prone environment:
Salt production created corrosion risks that made the shift to wireless communication strategically important.
An operator checks equipment beside a moving salt conveyor during an evening production shift, representing the need for reliable connectivity during continuous operations
3. Operations-grade stability:
The network needed to support stable factory operations while carrying large volumes of equipment data in real time.
Network and plant specialists review a site plan while commissioning a private network cabinet beside salt storage and processing infrastructure
4. Licensing and cost balance:
The initiative had to combine carrier-grade reliability, cost-effectiveness and comprehensive support for private 5G licenses.
Solution
A managed private 5G service built around the plant

The delivery model brought together design, construction, connected devices, testing and ongoing operations, giving the plant one coordinated path from network planning to day-to-day use.

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End-to-end network delivery

The Managed Private 5G service covered network design and construction, creating wireless coverage for the plant environment.

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Industrial wireless access

Private 5G USB-type CPE and tablets connected equipment and employees, reducing dependence on fixed wired access in corrosion-prone areas.

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Managed operational reliability

Ongoing network operations were included to support the stable service needed for factory production and real-time data uploads.

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Licensing and lab support

The project provided support for private 5G licensing and access to a private 5G lab for connectivity testing and solution development.

Impact
More dependable paint quality decisions before release

According to the source, the client improved the overall efficiency of paint inspection and detected errors with greater accuracy. The catalogue also reports fewer vehicles being recalled from dealerships because of paint issues. No baseline, measured improvement, timeframe or attribution method is provided, so these outcomes should remain qualitative until the client validates the supporting evidence.

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