Onoken Co., Ltd. engages in the sale, and import/export of steel in Japan. It offers steel plates, such as coils, planks, thin plates, checkered steel plates, expand products, and wire rods; bar steel products, including H steel, angle iron, channel and flat steel, scalene iron and C-shaped steel, round and square pipes, square steel, I-beam, light weight channel steel, and columns; round steel products; and other bars. The company also provides building materials, such as steel sheet piles, heavy temporary lease, secondary concrete products, cast iron pipe, drainage pipe, grating, linear plates, and Houmen related products; and sells construction machine products comprising steel construction, exterior wall construction, steel joinery work, roof construction, interior and housing, insulation work, and pile construction products. The company was formerly known as Ono Kenzai Co., Ltd. and changed its name to Onoken Co., Ltd. in February 1957. Onoken Co., Ltd. was incorporated in 1949 and is headquartered in Kita-Kyushu, Japan.