In 1961, Toyo Suisan was becoming a diversified food company and entered the instant noodle business with the goal to achieve higher quality noodle products which were then on the market in Asia. By 1970 Toyo Suisan ranked as one of Japan's most prominent food companies. In 1972, Toyo Suisan entered the international market. Maruchan, Incorporated was formed in 1977 and opened its first, ramen manufacturing plant in Irvine, California.

Ajinomoto Co., Inc. (Ajinomoto Co) and Toyo Suisan Kaisha, Ltd. (Toyo suisan) signed a joint venture agreement on 31st March 2014 to establish instant noodle business company in India. The parties plan to apply for incorporation and establish new company in India.

Maruchan Ajinomoto India Private Limited is private incorporated on 3rd December 2014. It is classified as Non-Govt Company and is registered at Registrar of Companies, Chennai.

In 2000, researchers at the University of Miami reported the presence of umami receptors on the tongue. Six years later, Ajinomoto’s Institute of Life Sciences discovered that similar receptors were also present in the stomach. The importance of glutamate—not only to our sense of taste but also for nutritional and physiological well-being—is being demonstrated more and more through our recent research.