| Toyo Rikagaku Kenkyusho Co., Ltd. | |
| Foundation: | Niigata (April 5, 1950) |
| Key People: | Kunihiko Hongo, CEO |
| Num Employees: | 500 (2004) |
Toyo Rikagaku Kenkyusho, Ltd (東陽理化学研究所) is a Japanese company based in Tsubame-City, Niigata, whose core business is metalworking technologies.