Meiji 31: Establishment of Koriyama Silk Spinning Co., Ltd. in Koriyama City. The Meiji government promoted development using the Asakura irrigation system, which became the foundation for Koriyama's growth, and operated both power generation and surplus electricity‑powered spinning, becoming the eighth silk spinning company established in Japan.
Establishment of Koriyama Silk Thread Spinning Co., Ltd. (Koriyama City)
1898 (Meiji 31): Establishment of Koriyama Silk Thread Spinning Co., Ltd. (Koriyama)
Establishment of Koriyama Silk Thread Spinning Co., Ltd. (Koriyama)
1918 (Taisho 7): Establishment of Fukushima Refined Yarn Co., Ltd. (Fukushima)
Records indicating the activity of Koriyama Silk Spinning Co., Ltd. during the Taisho era
Establishment of Fukushima Refined Yarn Co., Ltd. (Fukushima)
Founded Nitto Bō Seiki Co., Ltd.: Fukushima Textile Co., Ltd. (formerly Fukushima Seiren Seito Co., Ltd.) integrated Katakura Seito Iwaya Spinning Plant (formerly Koriyama Silk Spinning Co., Ltd.) and changed the company name to Nitto Bō Seiki Co., Ltd.
1923 (Taisho 12): Establishment of Nitto Spinning Co., Ltd. – Fukushima Spinning Co., Ltd. (formerly Fukushima Refining Silk Co., Ltd.) acquired Katakura Silk Iwaya Spinning Plant (formerly Koriyama Silk Spinning Co., Ltd.) and changed its name to Nitto Spinning Co., Ltd.
Founded Nitto Bō Seiki Co., Ltd.: Fukushima Textile Co., Ltd. (formerly Fukushima Seiren Seito Co., Ltd.) acquired Katakura Seito Iwaya Spinning Plant (formerly Koriyama Silk Spinning Co., Ltd.) and changed the company name to Nitto Bō Seiki Co., Ltd., founding.
Silk spinning equipment of Fukushima Seiren Seito Co., Ltd.
April 1, Taisho 12: Establishment of Nitto Spinning Co., Ltd.
Taisho 7: Establishment of Fukushima Refined Yarn Co., Ltd.
Records indicating the operation of Koriyama Plant during the Taisho 12–15 years
Taisho 7: Establishment of Fukushima Refined Yarn Co., Ltd.
Record indicating the creation of a promotional poster in 1933.
1938 (Showa 13): Successful industrialization of glass fiber – the first in the world, coinciding with the industrialization by Owens Corning Glass Works in the United States
Successfully industrialized glass fiber: first in the world, at the same time the U.S. company Owens Corning Glass Works industrialized.
Showa 8: Industrialized artificial fiber staple fiber (Suf) made from pulp using in‑house technology (first in Japan).
Record indicating the creation of a promotional poster in 1938.
Showa 13: Industrialized glass fiber (first in the world); industrialized rock wool (first in Japan).
1949 (Showa 24): Commencement of glass wool production
Paramount Glass Industry Co., Ltd. Koriyama Factory (1942).
Started manufacturing glass wool.
1960 (Showa 35): Launch of the long‑selling product "Nitto Spinning New Wipe®"
Record concerning 1960. Details unknown.
Released "Nitto Bō's New Wipe®", a long‑seller product.
Record concerning 1963. Details unknown.
1969 (Showa 44): Start of manufacturing glass cross for printed circuit boards and the ladies' core fabric "Danleune®"
Started manufacturing glass cross for printed circuit board wiring: started manufacturing ladies' core fabric "Danleune®".
Showa 44: Released glass cross for printed circuit board wiring.
1982 (Showa 57): Commencement of manufacturing blood coagulation factor test reagents
Record concerning 1982. Details unknown.
Started manufacturing blood coagulation factor test reagent.
Showa 57: Started manufacturing blood coagulation factor test reagent.
1984 (Showa 59): First industrialization of functional polymer "PAA®" in the world
Record concerning 1984. Details unknown.
First in the world to industrialize functional polymer "PAA®".
Successfully synthesized the specialty chemical PAA® (world's first) and released it in 1984
Record concerning 1986. Details unknown.
Acquired management rights of American IIC (predecessor of Nittobo America Inc.) in 1986
Record concerning 1987. Details unknown.
Established Nittobo Medical Co., Ltd. in 1987
1988 (Showa 63): Launch of immunoserology test reagents
Established in 1988: Nittobo No-Plex Oak Co., Ltd. (Taiwan). A joint venture producing glass fiber yarn, the predecessor of NITTOBO ASIA Glass Fiber Co., Ltd.
Released immunoserology test reagents.
Established Nittobo, Nooplex, and Oak Co., Ltd. (Taiwan) in 1988
Record concerning 1969. Details unknown.
Nittobo Medical Co., Ltd. established. Manufactures and sells diagnostic drugs for external use.
Record concerning the completion of the factory. Details unknown.
Record concerning 1998. Details unknown.
Released the specialty glass NE Glass in 1998
Record concerning 2004. Details unknown.
2014: Release of core fabric "SDDC" for difficult adhesive materials
Record concerning 2006. Details unknown.
Released Flat Fiber in 2006
2008 (Heisei 20): Fukushima Plant and Fukushima Plant 2 received the PRTR Award
Fukushima Plant and Fukushima Plant 2 received the PRT Award.
2015 (Heisei 27): "Nitto Spinning New Wipe®" received the Good Design Long Life Design Award; Nittobo Medical Co., Ltd. received the Private Sector Agricultural, Forestry and Fisheries Research and Development Achievement Award; Minister of Agriculture, Forestry and Fisheries Award
Record concerning 2015. Details unknown.
"Nitto Bō's New Wipe®" received the Good Design Long‑Life Design Award; Nittō Bō Medical Co., Ltd. received the private sector agriculture, forestry and fisheries research and development achievement award; received the Minister of Agriculture, Forestry and Fisheries Award.
Received the Minister of Agriculture, Forestry and Fisheries Award in 2015 for developing a recombinant insect-based in vitro diagnostic pharmaceutical
Record concerning 2018. Details unknown.
2018: Release of "IgG4 measurement reagent" for general-purpose analytical equipment
2019 (Reiwa 1): Baotek Industrial Materials Ltd. (Taiwan) became a consolidated subsidiary
Record concerning 2019 and 2020. Details unknown.
Nitto Bō Group 100th anniversary. Created 100th anniversary video and logo.
Baotek Industrial Materials Ltd. (Taiwan) became a consolidated subsidiary.
Acquired Kamiya Biomedical Company, LLC (USA) for the sale and manufacture of in vitro diagnostic pharmaceuticals in 2019 and 2020
Acquired Capricorn Products, LLC (USA) in 2019 and 2020
Made Baotek Industrial Materials Ltd. (Taiwan) a consolidated subsidiary in 2019 and 2020
Record concerning 2021. Details unknown.
Established a new specialty glass production plant at NITTOBO ASIA Glass Fiber Co., Ltd. (Taiwan) in 2021
Record related to Reiwa 4. Details unknown.
Expanded the California plant of Nittobo America Inc. in 2022
Record related to Reiwa 5. Details unknown.
Celebrated the 100th anniversary of the Nitto Fubun Group on April 1, 2023
Nitto Bouseki Co., Ltd. reported that a system operated by its outsourced logistics partner, OpenLogi Co., experienced unauthorized access by a third party, potentially leading to the leakage of customer personal information. No reports of misuse have been received to date, and the company has explained the details and countermeasures.
Nitto Spinning Co., Ltd. was selected for JST's Co-creation Support Program (COI-NEXT) and, in collaboration with Tohoku University, established the "Zero-Carbon Future Regional Co-creation Base Realized with Innovative Functional Nanomaterials." This project aims to spread from the 2035 zero-carbon goal of Nami-cho to the entire Fukushima Prefecture and all of Japan.
Permanent countermeasures against PHP vulnerabilities have been completed, and the previously stopped services and pages have resumed operation from October 30, 2026. The affected sites include the inquiry pages on the websites of Nitto Bō and its group companies. The countermeasures involved applying updates and security patches, and the company announced that safety has been confirmed.
Due to system maintenance, various inquiry pages of Nitto Bō and its group companies, as well as the product information pages of the English version of Nittō Bō Medical Co., Ltd., will be sequentially suspended. During the maintenance period, the target pages cannot be viewed and the inquiry forms cannot be used.
Nitto Boshiki Co., Ltd. has joined the HDP (High Density Packaging) consortium, which focuses on electronic materials and implementation technologies. By joining, the company aims to contribute to solving challenges in the next‑generation electronics industry by leveraging high‑performance glass fiber technology with low dielectric properties.
On October 15, 2026, Nitto Boshoku entered into a joint research and development agreement with Aqualung Carbon Capture AS of Norway to develop advanced polymer materials for CO₂ separation membranes. The two companies will jointly develop and manufacture the materials and evaluate their suitability for industrial-scale production. Nitto Boshoku will provide expertise in polymer chemistry and functional chemical manufacturing, while Aqualung will contribute its know-how in membrane development and CO₂ separation performance evaluation.
Taiwan Nitto Fiber Co., Ltd. will exhibit at the TPCA Show TAIPEI 2026, held at the Nangang Exhibition Center in Taipei from October 20 to 22, 2026. The booth will display low-dielectric glass, low thermal expansion glass, ultra-thin glass cross, etc. The booth number is L-704 on the 4th floor of Building 1.
Nitto Spun will debut at the international plastic processing trade fair FAKUMA 2026, held in Germany from October 12 to 16, 2026. The company will showcase high-performance products such as the irregular cross-section glass fiber 'Flat Fiber®', as well as its initiatives on recycled glass fiber using a mass balance approach. During the event, researchers are scheduled to present on initiatives centered around environmentally conscious products.
The carbon cycle demonstration project model based on general waste treatment facilities in Koriyama City, proposed by Kawasaki Heavy Industries as the lead implementer, has been selected for the Environmental Agency's entrusted project. The five parties—Koriyama City, Kawasaki Heavy Industries, Air Water East Japan, Eastern Gas, and Nitto Spinning—aim to utilize CO₂ collected at the Fukuya Clean Center to produce synthetic methane for regional use. The project period is scheduled from FY Reiwa 8 to FY Reiwa 11.
The Nitto Bō Group donated 10 million yen to the Japanese Red Cross Society to support the victims of the Kumamoto earthquake in Reiwa 8 and aid in the reconstruction of the affected area. The donation was made on August 12, 2026. The company will continue to cooperate with government and industry groups to provide support tailored to the disaster situation.