Nippon Steel
| Logo used since 2019 | |
| Marunouchi Park Building, headquarters of Nippon Steel | |
| Native name | 日本製鉄株式会社 | 
|---|---|
| Romanized name | Nippon Seitetsu kabushiki gaisha | 
| Formerly | Nippon Steel & Sumitomo Metal Corporation (2012–2019) | 
| Company type | Public | 
| TYO: 5401 NAG: 5401 FSE: 5401 SSE: 5401 TOPIX Large70 component | |
| Industry | Steel | 
| Predecessors | |
| Founded | October 1, 2012 | 
| Founders | 
 | 
| Headquarters | Marunouchi, , Japan | 
| Key people | Eiji Hashimoto (Chairman & CEO) | 
| Revenue | ¥6.177 trillion (2019) | 
| ¥114.20 billion (2017) | |
| ¥251.69 billion (2019) | |
| Total assets | ¥8.049 trillion (2019) | 
| Total equity | ¥3.230 trillion (2019) | 
| Number of employees | 105,796 (2019) | 
| Subsidiaries | Nippon Steel Engineering Nippon Steel Materials Nippon Steel Chemical U.S. Steel | 
| Website | www | 
Nippon Steel Corporation (日本製鉄株式会社, Nippon Seitetsu kabushiki gaisha) (previously known as Nippon Steel & Sumitomo Metal until 2019) is Japan's largest steelmaker, headquartered in Marunouchi, Chiyoda, Tokyo. The company has four business segments, which are steelmaking, engineering, chemicals, and systems solutions. It is the largest producer of crude steel in Japan and the fourth largest in the world.
The company is on the Forbes Global 2000 list, ranked 1971 in 2023. The company is the third incarnation of the Nippon Steel name, each time with a slightly different spelling or pronunciation. The original company, known as Japan Iron & Steel Co., Ltd. (日本製鐵, Nihon Seitetsu), was split into two separate companies in 1950. These two companies later merged in 1970 to form Nippon Steel Corporation and this name lasted until 2012, when it merged with Sumitomo Metal Industries. The company’s English name reverted to its 1970 name in 2019, while its Japanese name returned to the original 1934 name.