Kikkoman Corp (Kikkoman) is primarily engaged in the manufacturing and sale of food products, beverages, liquor, wine, and soy sauce. Kikkoman's key activities include the manufacturing and sale of soy sauce, food products, beverages, and the wholesale of Asian food products. The company’s business portfolio includes the production and sales of Kikkoman Soy Sauce on a global scale, Del Monte processed tomato products, canned fruit, and corn products in Japan and the Asia/Oceania region (excluding the Philippines), and soymilk in Japan and the Asia/Oceania region. The company also engages in the global procurement and sales of diverse food ingredients, emphasizing Japanese food items such as rice, miso, seaweed, and seafood. Kikkoman's operations are divided into domestic and overseas segments, focusing on manufacturing, sales, and wholesale activities. The company serves a wide range of customers, including those in the food production, wholesale, and retail sectors. As of March 2026, the company operated eight soy sauces plants outside Japan. Geographically, the company operates into three segments: Japan, Overseas, and Kikkoman (Holding Company). Kikkoman has business presence in Americas, Europe, and Asia-Pacific.

Kikkoman focuses its research and development activities on "food and health," covering areas such as soy sauce brewing, food, and biotechnology. The company conducts a wide range of R&D, including basic research for future product development, in collaboration with domestic and international research institutions. Kikkoman's R&D efforts span Asia, Europe, and the United States, with each operating company developing products related to its business. Key areas of development include soy sauce manufacturing, new product development to meet consumer needs, container development, and processing technologies to improve quality. The company has developed various new products across its divisions, including soy sauce, food, beverages, and alcoholic beverages, as well as products in the biochemical field such as clinical diagnostic enzymes and hygiene testing kits. The Research and Development Division of Kikkoman Corporation is primarily responsible for conducting fundamental research and technological development related to business development and safety. This division focuses on the company's business domain of "food and health" and manages a research system that encompasses soy sauce brewing, food, and biotechnology.