Hyoda Keiki Kogyo develops and manufactures measurement and control equipment such as thermometers and pressure gauges for various industries. They hold a 90% share of the domestic thermometer market and also boast an overwhelming market share in protection equipment for heavy electrical equipment in power generation facilities and plants.
JR, one of their customers, is the only company certified to supply thermometers for the transformers used in Shinkansen trains. Their thermometers have been installed in trains from the first generation to the latest N700 series. "The Shinkansen runs through mountainous and valley-filled terrain, and for 45 years since its opening, it has been accident-free. To maintain that safety, we cannot afford even the slightest malfunction in our instruments," says President Yoshio Hyoda.
The same "absolute" requirement applies to nuclear power plants. Hyoda brand products are standardized with high-spec specifications, anticipating various problems depending on the application.

Since its founding, the company has assembled over 10,000 different types of instruments. In 2009, its hybrid temperature transmitter was certified as a unique product by the Higashi-Osaka Brand Promotion Organization. Conventional dial thermometers measure temperature using the expansion and contraction of a fluid, which has the drawback of not being able to measure over long distances. On the other hand, the hybrid type combines the temperature sensor with the temperature sensing element, enabling simultaneous on-site measurement and remote measurement. Because it can perform the functions that were previously handled by separate thermometers, it is being used in applications such as monitoring the temperature on-site in various plants and transmitting the data to the control room.
The ability to produce such highly complex instruments is a testament to the company's history of over 90 years. The company accepts orders for instruments tailored to various usage conditions, even for single units. Assembly is almost entirely done by hand, with repeated prototyping and experimentation, refining the case structure, paint, and welding techniques.

The defect rate is low, at less than 0.1%. In addition to regular training, monthly quality meetings constantly strive for improvement. Furthermore, all employees carry quality policy cards and report their progress toward individual goals numerically. Defective products are processed immediately, ensuring swift and reliable error elimination.
"Japanese manufacturing has been driven by skilled craftsmen who can devise appropriate strategies based on their experience. The transmission of such skills is essential to our company." In today's society, where various industrial systems operate smoothly at all times, the company's products, born from meticulous work, continue to watch over safe and comfortable living.

We provide specialized protective equipment essential for infrastructure development, such as for nuclear power plants and Shinkansen bullet trains.

We are a manufacturer of measuring instruments used throughout society, including plants, nuclear power plants, and transportation systems. We hold a 90% domestic market share for thermometers. We are the only company certified to supply thermometers for JR's train transformers, and our products have been used in Shinkansen bullet trains from the first generation to the latest models. We can handle abnormal environments and vibrations, and we produce products that satisfy our customers even for single-unit orders.

Manufacturing and sales of industrial metal thermometers, thermocouples, resistance thermometers, heavy electrical equipment, pressure gauges, protective tubes, and related equipment.

Heavy electrical equipment and nuclear power, ships and chemical plants, textiles, dyeing and food, and all other industrial sectors.