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| 1887 | Established Tokyo Rope Mfg. Co., Ltd. started production of the ropes made of Manila hemp, as the first rope manufacturer in Japan. |
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| 1897 | Started to produce steel wire ropes, also as the first manufacturer in Japan. |
| 1942 | Founded the integrated fiber rope plant in Gamagori City. |
| 1952 | Started production of synthetic fiber ropes as the first in the rope industry. |
| 1963 | Started to make eight-strand plaited ropes by own developed plaiting machines named TOSCO. |
| 1968 | Fiber Rope Department of Tokyo Rope Mfg. Co., Ltd. was separated and newly established the TOKYO SEIKO ROPE MFG. Co., Ltd. |
| 1976 | Started to make double braided ropes named TOUGH-LAY by own developed unique machines which featured in large and sharp braiding. |
| 1981 | Started to produce Kevlar ropes first in Japan. Sience then, we have kept developing ropes from new fibers such as Technora, Vectran, Techmiron, etc. |
| 1991 | Introduced an universal tensile testing machine(500 metric ton capacity) as the first company in Japan. |
| 1997 | ISO 9002 (NO, JSAQ190) registered by J.S.A. (Japan Standard Association). |
| 2000 | ISO 9001 (NO, JSAQ190) registered by J.S.A. (Japan Standard Association). |
| 2009 | Joined Cordage Institute. |