The company succeeded in the first industrialization of glass fiber in Japan through technologies of the textiles business which is its original business. It provides products for a wide range of applications, such as electronic materials and industrial materials, with consistent coverage from yarn manufacturing to glass cloth processing.
Above all, micro-unit, ultra-thin glass cloth, manufactured by the company's unique technology, is employed as an important precision material for electronic devices that are constantly being downsized, light-weighted and functionally improved such as PC and smart phones, and is highly competitive.
Furthermore, for "in-vitro diagnostic drugs" in the life science business, more than 10 items of the company, have the top share in Japan.
【1-1 Corporate History】
"Koriyama Kenshi Boseki Co., Ltd" founded in Koriyama, Fukushima Prefecture in 1898, is the predecessor. The company has a history of 120 years.
Nitto Boseki Co., Ltd. was established in 1923 when Fukushima Boshoku Co., Ltd. (formerly Fukushima Seiren Seishi Co., Ltd.) acquired the ownership of the Iwashiro Spinning Plant of Katakura Seishi (former Koriyama Kenshi Boseki Co.,Ltd) in 1918.
In 1938, it succeeded in industrialization (mass production) of glass fiber for the first time in Japan. In the world, Owens Corning Glass Fiber of the United States has achieved the industrialization of glass fiber around the same time.
In 1949, it began manufacturing glass wool for the first time in Japan.
In 1969, utilizing the technologies cultivated in the textile business, the company began manufacturing glass cloth for printed circuit board. In 1982, it began manufacturing test reagents for blood coagulation factors. And in 1983, it succeeded in industrializing functional polymers "PAA®" for the first time in the world. As such, the company has continued to challenge new fields and expanded its business fields.
It has established the "Long-term Vision 101" and medium-term management plan, "Go for Next 100" targeting its 100th anniversary in April 2023 and is currently implementing them.
【1-2 Corporate Philosophy】
Its corporate philosophy is as follows: "As a corporate citizen contributing to healthy and comfortable lifestyles, the Nittobo Group endeavors to raise its value within society through consistent effort to realize a more affluent society for everyone."
Furthermore, under the following Nittobo Declaration, it is aiming to be society's "best partner" in collaboration with all stakeholders.

【1-3 Business contents】
(1) Business contents
The company's business can be largely divided into three categories, namely, the "Textiles Business" which manufactures and sells textile products mainly for the apparel industry, the "Glass Fiber Business" which manufactures and sells various products using glass fiber, and the "Life Science Business" that manufactures in-vitro diagnostics in the immunology field and specialty chemicals products.
As for the reporting segments, the "Glass Fiber Business" is divided into three categories, namely, the "Glass Fiber Yarn Business," "Glass Fiber Cloth Business," and "Glass Fiber for Industrial Materials Business." Together with the "Textiles Business" and "Life Science Business," there are a total of 5 reporting segments. In addition, there is a category called "Others" which consists of the real estate business and service business that are not included in the reporting segment.
(1) Textiles Business
The company provides products utilizing its unique technologies to respond to the diversifying needs of customers, from yarns that are indispensable for clothing, to secondary materials and products. "C・S・Y (Core Spun Yarn)" is the double-structured texitle which is the precursor of stretch fabrics. "Dan Reine" is adhesive interlining for women and has been boasting high market share. And "Nittobo Dishcloth" won the 2015 Good Design Long Life Design Award.
The company is planning to pursue integrated management of its overseas bases such as Nittobo (China) Co., Ltd. with domestic businesses, strengthen its development capabilities, and strive to produce higher value-added products and enhance customer appeal.
(2) Glass Fiber Business
The company succeeded in the first industrialization of glass fiber in Japan. It provides products for a wide range of applications with consistent coverage from yarn manufacturing to glass cloth processing.
Above all, micro-unit, ultra-thin glass cloth is employed as an important precision material for electronic devices that are constantly being downsized, light-weighted and functionally improved such as PC and smart phones, and its quality receiving high appraisal throughout the world.
In addition, the company spearheaded the manufacturing of glass wool in Japan to be used as insulation for housing, and is regarded as the pioneer of heat insulation materials with its unique technologies. In particular, high performance glass wool contributes to an energy-saving society as heat insulation materials for very airtight and highly heated insulating houses.

<What is glass fiber?>
Glass fiber is a product for which glass is melted at a high temperature of 1,300℃ or higher and stretched to be fibrous.
The company succeeded in the industrialization of glass fiber for the first time in 1938 in Japan, and it developed rapidly thereafter.
Its characteristics include strength, heat resistance, non-flammability, electrical insulation and chemical resistance, and it is used for various purposes such as building materials, and printed circuit boards. For its excellent characteristics, it is being used in a wide range of industries.
(Composition, property)
As described earlier, it has characteristics such as strength, heat resistance, non-flammability, and electrical insulation. However, to be applied as electronic materials, higher level of performance including high strength, high elasticity, and low dielectric is required.
(Manufacturing method)
After raw materials of glass are melted at a high temperature of 1,300 to 1,600℃, they pass through a dedicated machine called a platinum nozzle and are reeled up to form a filament. A very precise control technique is required.
The thinness of the glass fiber, which is a glass base pulled out from the machine at high speed, is 4 to 24 micrometers in diameter. (*The thinness of a human hair is about 50 to 100 micrometers.)
The spun glass fiber is processed into product forms according to the application.
(Major product forms)
◎Yarns
Yarns (spun fiber) include a single yarn which is a strand composed of several hundred filaments that are simultaneously spun and twisted in the same direction and a twisted yarn which is made by twisting several single yarns.
The "E glass yarn," a single yarn made of twisted strands mainly composed of filaments of 4.0 μm to 7.4 μm, is generally used formaking glass cloth. As an industrial material, it is highly evaluated as a substrate for composite materials that have the high degree of compatibility with resin and excellent workability by the company's unique surface treatment technology.
◎Glass cloth
Glass cloth, which is fabric (cloth form) made of glass fiber yarns, is used for a wide range of applications such as printed circuit boards, damping materials, tent films, and road reinforcement materials.
Among them, the glass cloth used for printed circuit boards and electronic parts is the company's flagship product that it boasts worldwide.
【Glass cloth for printed circuit boards】
A printed circuit board is formed of the fine wiring of metals such as copper on the surface of a base body such as resin, and components including resistors, capacitors and IC chips are fixed by soldering on the wiring. It is an important parts that influence the performance of all electronic equipment, including PC, smartphones, servers, medical equipment, industrial robots, automobiles, and aircraft.

For the insulator of the board body, various materials such as glass and polyester resin are used. Glass fiber, which has characteristics of high insulation, high strength, heat resistance, and dimensional stability, is thought to be the most suitable material for a printed circuit board.
Along with remarkable development of digital technologies, electronic devices such as PC and smartphones are becoming lighter, thinner, smaller and more sophisticated, and the need for the improvement of glass cloth performance is increasing.
In response to these needs, the company develops high function glass cloth products such as "Low dielectric glass cloth (NE-glass)," "Low CTE glass cloth (T-glass)," and "Ultra-thin glass cloth," using the strengths of integrated manufacturing based on its unique technologies including glass composition development technology, fiber development technology and textile processing technology and has a high market share.
"Low dielectric glass cloth (NE-glass)"
Higher speed transmission with higher frequency is becoming more common, and low dielectric materials that reduce transmission loss is needed for printed circuit boards.
To address the need, the company has developed the "NE-glass" that is excellent in low dielectric constant and dissipation factor with the same characteristics as "E-glass" by lowering the component ratio of alkaline-earth elements (CaO, MgO) as compared with the conventional "E-glass" while enhancing the component ratio of boric acid (B2O3).
It is mainly used for electronic boards for data centers and base station servers.
"Low CTE glass cloth (T-glass)"
"T glass" has the higher component ratio of silica (SiO2) and alumina (Al2O3) compared with the standard "E-glass" and provides significantly advanced mechanical and thermal performance of glass fiber.
Utilizing its low thermal expansion characteristics and high tensile elasticity, it realizes excellent dimensional stability and increased rigidity, and it is used as an electronic substrate for semiconductor packages mainly mounted on smartphones as a high performance electronic material.
Like carbon fiber and aramid fiber, it also works well as a reinforcing material for advanced composite materials, so it is used by itself or as a hybrid material with carbon fiber in the fields of aviation, space and sports.
"Ultra-thin glass cloth"
Demand for thinner glass cloth is increasing as a material to respond to the trend of making lighter, thinner and smaller printed circuit boards with high density packaging. In addition to its thinness, the company's ultra-thin glass cloth has superb capacities to process fine holes both for laser and drill processing and offers great dimensional stability and surface smoothness as a laminated plate.
The product forms and uses by segment in the glass fiber business are as follows.
(3) Life Science Business
The Life Science Business consists of the Medical Division and the Environment and Health Division.
The Medical Division manufactures and sells in-vitro diagnostic drugs used for blood and urine tests and specialty chemicals products centered on functional polymers.
The company is achieving high quality and stable supply of the "in-vitro diagnostic drugs" that are used in health checkups and thorough physical examinations to examine health status using blood or urine, by integrally manufacturing them from the antiserum as the raw material to the diagnostic drugs as the final product within the Group.
The products' high quality has been recognized, and they are supplied in medical fields globally. In Japan, the company is winning the top share with more than 10 items.
As for the Specialty Chemicals Business, the company develops and sells unique functional polymers (polyallylamine and polyamine series). The characteristics of this business are R&D together with chemical products/pharmaceutical manufacturers and research institutes and product proposals that capture customer needs. The company is strong in niche markets and is actively expanding the business not only in Japan but also in the global market.
For the Environment and Health Business, the company utilizes the technologies that have been cultivated over many years to develop a business in the beverage industry.
In the beverage business, centered on the private brands, it is working on development of plastic bottles, beverage production and bottling.
(2) Research and development (R&D)
Since its founding, the Group has been actively promoting R&D and delivering products unique to the Group to the world.
R&D will continue to be a source of enhancing the company's competitiveness and corporate value.
In recent years, while the needs of customers are becoming more sophisticated and diversified, global competition is intensifying. Under these circumstances, the company established its general research laboratory in 2017 to provide products and services with high added-value and strong originality in a timely manner with its characteristics and strengths, and to promote R&D and technology development with an eye toward the future.
The Group will continuously work on R&D and technology development from the viewpoint of expertise in each business division. At the same time, it will promote cross-sectional management by the research laboratory to pursue synergy among businesses with a focus on speed.
Furthermore, in each field, in order to accelerate research speed and expand the perspectives, the company is actively promoting joint research on industry, government and academia from the viewpoint of open innovation.
【1-4 Characteristics and strengths】
◎ Supply products by accurately grasping needs of the times
In addition to succeeding in the industrialization of glass fiber for the first time in Japan, the company began manufacturing glass wool for the first time in Japan. As such, the company has been always leading the global and Japanese markets in the field of glass fiber. In the history of over ninety years, it has always been capturing the changes and needs of the world accurately and developing and supplying various products centered on glass fiber.
Since the company is not manufacturing final products, people do not see the company's products. However, it supplies materials that are indispensable to the world and supports our lives behind the scenes.
◎ High competitiveness by unique technologies
Among many manufacturers of glass fiber in the world, it is almost the only company that realized excellent low dielectric constant and low dielectric loss tangent (NE-glass) and high dimensional stability and higher rigidity (T-glass) in the field of glass cloth for electronic materials and has established a system that can stably supply sufficient volume.
In addition, having acquired the top share in Japan for more than 10 items with in-vitro diagnostic drugs in the Medical Division also shows its high competitiveness with its unique technologies.
【1-5 ROE Analysis】

The company's goal is to achieve 8% or more in the fiscal year ending March 2020 and 10% or more in the fiscal year ending 2023.
The ROE for the fiscal year ended March 2018 greatly increased, as the company posted a gain of 4.2 billion yen on the sale of non-current assets in net income.
Expansion of sales of high value-added products and promotion of cost reduction will be the keys.