Nissan Group 日産コンツェルン (Nissan Concern^?), or formerly Nissan zaibatsu, is one of 15 of Japan's most powerful business groupings. Founded in 1928 by Yoshisuke Aikawa, the group was originally a holding company created as an offshoot of Kuhara Mining Co.(present day Nippon Mining & Metals Company), which Aikawa had taken over as president of from his brother-in-law, Fusanosuke Kuhara. After the bankruptcy of the Kuhara zaibatsu following World War I, Aikawa reorganized its assets into (Japan Industries) or Nippon Sangyo Corporation (日本産業株式会社), Nissan for short.

The group's core business was real estate and insurance with hundreds of member companies, including fisheries, mining companies, and is affiliated with Hitachi Group companies, as well as what Nissan is now known for--its automobile industry. Nissan and Hitachi mean similar things in Japanese, Nissan means "Japan Made" and Hitachi means "Japan Built", hence the swapping of names.

After World War II, the zaibatsu was disbanded, and reformed into Nichiyo-kai, otherwise known as Nissan Group.