4 Tokyo Metro operation startsAsakusa‒Ueno section(First underground railway in Japan)Outbreak of the Korean WarOperation begins betweenShin-Osaka and Hakata「Gekkou」(Worldʼs first sleeper express train)BritishRoyal WeddingMarriage of Prince Charles and Princess DianaHokurikuShinkansenoperation startsTakasaki‒Nagano section1918: Founder Shigetaro Toyama establishes Toyo Architecture Co., starting research on concrete sleepers.1927: First installation of concrete sleepers at Tokyo Station.1933: Establishment of Toyama Railway Research Institute, developing various patented railway fastening system.1934: Headquarters moved to Shiba Park, Minato, Tokyo.1942: Sleeper factory built in Anyang-ri, Korea, supplying 80,000 concrete sleepers to Korean railways.1945: Post-war restart with the establishment of Toyama Kizai Co., Ltd., supplying railway equipment to the Japanese Railway Ministry.1947: New concrete sleeper factory built in Tama Village, Tokyo, resuming production and research.1950: Nihon Kogen Concrete Co., Ltd. was established to manufacture prestressed concrete (PC) sleepers.Merged with Toyama Kizai Co., Ltd. It was first company focusing on the manufacture of PC sleepers in Japan, which have superior strength and durability compared to reinforced concrete (RC) sleepers.1951: Prototype PC sleeper tested on Tokaido Line between Omori and Kamata.1955: Establishment of Tetsudo Kizai Kogyo Co., Ltd. for advanced track material research and production.1965: Development of TK-type inversed wedge rail fastening system with single plate spring and its sleepers, improving track adjustment and cost efficiency.1967: Developed the TK type inverted wedge rail fastening system with double plate spring and its sleepers. The fastening system designed for curved tracks with double plate spring which bears lateral pressure. The double plate spring is considered as the ultimate plate spring shape. Other plate springs in Japan become similar shape.1967: President Shigetaro Toyama receives the Order of the Sacred Treasure, 3rd Class, for contributions to railway transportation development.1971: Developed and began selling the TK-Type Anti-Derailment Guard Holder.Features include a small number of parts, light weight, and easy handling.1972: Introduction of a slab track system utilizing PC methods and wedge-type adjustment pads.1977: Completion of TK-11 Fastening System for sharp curves, reducing vibration and rail wear.1981: Developed the Crossing Board with Recycling Plastic and its PC sleepers.By using recycled plastic for the paving plates, we commercialized the original railroad crossing which is lightweight, easy to attach and remove, and no corrosion.1989: Opening of Osaka sales office to strengthen business in western Japan.1993: Test installation of Convertible Fastening System to Pandrol. By fastening recycled shoulders to embedded plugs with screws, it is possible to quickly and easily convert large quantities of PC sleepers into Pandrols.1997: Ballastless Anti-Vibration Track was jointly developed with the Railway Technical Research Institute. A removable anti-vibration sleeper device that reduces vibration and noise by allowing components to be replaced without destroying the roadbed concrete.2004: Launch of Delkor ALT type Rail Fastening System, integrating rubber and cast metal for cost-effective noise and vibration reduction.2010: Development of Fastening Device for Joint Settlement Adjuster to raise rail joints without using tamping machines.2013: Logistics operations transferred to group company Nihon Kizai Kogyo Co., Ltd. (established in 2011), strengthening logistics and resin product manufacturing.2015: ISO 9001 certification obtained.2017: Headquarters relocated to Ginza, Chuo-ku, Tokyo.2018: 100th anniversary of the companyʼs founding.2022: Built the "Tetsudo Kizai R&D", our research and development facility, in Kawaguchi, Saitama. 100 Years of History-TETSUDO KIZAI KOGYOHistory &
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