| 1898 | Koriyama Kenshi Boseki Co., Ltd. founded in Koriyama. |
|---|---|
| 1918 | Fukushima Seiren Seishi Co., Ltd. founded in Fukushima. |
| 1923 | NITTO BOSEKI CO., LTD established — Fukushima Boseki Co., Ltd. (formerly Fukushima Seiren Seishi) acquired and merged with Katakura Seishi Iwashiro Bosekisho (formerly Koriyama Kenshi Boseki) and changed name to NITTO BOSEKI, CO., LTD. |
| 1938 | Succeeded in industrial production of glass fiber — First in the world, and almost coincided with the production by Owens Corning Fiber Glass in the U.S. |
| 1949 | Start glass wool production. |
| 1960 | Launched Nittobo Dishcloth, which proved to be a very long-seller. |
| 1969 | Started production of glass fabrics for print wiring board. Production of ladies' apparel interlining Dan Reine™ began. |
| 1982 | Production of blood coagulation factor test agents began. |
| 1984 | First in the world to industrially produce functional polymer PAA™ Launched Special Glass T-glass. |
| 1987 | Established NITTOBO MEDICAL CO., LTD. |
| 1988 | Immunoserological test agents launched. |
| 1998 | Launched Special Glass NE-glass. |
| 2008 | Fukushima No.1 and No.2 Factories received PRTR award. |
| 2015 | "Nittobo Dishcloth™" won Good Design Long-life Design Award. Received the Minister of Agriculture, Forestry and Fisheries Prize in the R&D Award. |
| 2019 | Baotek Industrial Materials Ltd. becomes a consolidated subsidiary. |
| 2020 | Established R&D building NI-CoLabo. Expanded Fukuyama Plant at NITTOBO MEDICAL CO., LTD. |
| 2021 | Established the new factory of Special Glass at NITTOBO ASIA Glass Fiber Co.,Ltd.（Taiwan） |
| 2022 | Nittobo America Inc. expanded its California base. |
| 2023 | Celebrated our 100th anniversary. |
| 2024 | Started full-scale release of Special Glass NER-glass. |