| 1907 Coal tar distillation operation started at the state-owned Yawata Steel Works. |
| 1957 The chemical division of Yawata Iron & Steel Co., Ltd. was spun off to inaugurate Yawata Chemical Industry Co., Ltd. |
| 1969 No.1 petrochemical aromatics (BTX) plant at the Oita Works started operation. |
| 1970 The company name was changed to Nippon Steel Chemical Co., Ltd. |
| 1984 Nippon Steel Chemical and Nittetsu Chemical Industry Co., Ltd. merged to inaugurate the new Nippon Steel Chemical Co., Ltd. |
| 1989 Sale of ESPANEX, adhesive-free copper-clad laminate for flexible printed wiring board, started. |
| 1991 The Hirohata Works was established. |
| 1997 NSCC Carbon Co., Ltd. was established. |
| 2003 Nippon Techno-Carbon Co., Ltd. was established. |
| 2004 LPC-US, high-quality needle coke for graphite electrode, was developed and its sale started. The company succeeded in practical application of organic EL phosphorescence light emitting material, a first of its kind in the world. |
| 2005 ESFINE, color resist ink for liquid crystal display, was adopted for large-sized TV. |
| 2010 Epoxy resin operation of Tohto Kasei Co., Ltd. was integrated. |
| 2011 NSCC Functional Material Manufacturing Co., Ltd. was established. NS Styrene Monomer Co., Ltd. was established as a joint venture between the company and Showa Denko K.K. |
| 2012 Along with inauguration of Nippon Steel & Sumitomo Metal Corporation, the company name was changed to Nippon Steel & Sumikin Chemical Co., Ltd. |
| 1984 Nippon Steel Corporation New Materials Projects Bureau was established |
| 1985 Micron Co.,Ltd was established |
| 1987 Nippon Steel Corporation New Materials Bureau was established Nippon Micrometal Corporation was established |
| 1988 Metal foil business was started |
| 1991 Metal Substrate for Catalytic Converter business was started |
| 1995 Nippon Graphite Fiber Corporation was established |
| 1998 Nippon Steel Composites Co.,Ltd was established |
| 2006 Nippon Steel Materials Co.,Ltd was established |
| 2012 Nippon Steel Materials became Nippon Steel & Sumikin Materials Co., Ltd. |
