Nikken Kogaku Co., Ltd. manufactures and sells wave-absorbing blocks in Japan. The company offers wave dissipating and coastal revetment blocks. It also provides coastal protection blocks, and riverbank disaster-prevention and environment protection blocks. In addition, the company offers natural stones and geosynthetics products. It serves infrastructure, transport, tourism, civil engineering, as well as government and construction consultants. Nikken Kogaku Co., Ltd. was incorporated in 1950 and is headquartered in Tokyo, Japan.