IJTT Co., Ltd.

IJTT Co., Ltd. is a Japanese manufacturing company whose origins lie in automotive parts production. Its corporate history page records that in October 2013 Aimetaru Technology Co., Ltd., Jidosha Buhin Kogyo Co., Ltd. and TDF Co., Ltd. established a joint holding company, IJT Technology Holdings Co., Ltd., through a share transfer and listed on the Second Section of the Tokyo Stock Exchange. In April 2019 the holding company absorbed the three operating companies and changed its name to IJTT Co., Ltd., moving its head office to Yokohama, Kanagawa Prefecture in June of that year. It moved to the Tokyo Stock Exchange Standard Market in April 2022, was delisted in March 2024, and in April 2024 became a wholly owned subsidiary of ARTS-1 Co., Ltd. following a tender offer; in October 2024 it merged with ARTS-1 as the surviving company and again took the name IJTT Co., Ltd. The company describes its manufacturing as spanning automotive parts and, per its corporate philosophy text, robot parts that use precision machining technology to support mass production and labor saving. Its product pages list mobility components including axles, knuckles, hub and rotor assemblies, cylinder heads, cylinder blocks, exhaust manifolds, rocker arms, propeller shafts and differential carriers.

According to the company's official history page, in October 2013 Aimetaru Technology Co., Ltd., Jidosha Buhin Kogyo Co., Ltd. and TDF Co., Ltd. established a joint holding company named IJT Technology Holdings Co., Ltd. through a share transfer and listed on the Second Section of the Tokyo Stock Exchange. In June 2015 Aimetaru Technology absorbed Isuzu Techno Sand Co., Ltd., and in December 2016 it absorbed San-ei Seisakusho Co., Ltd. In March 2018 the three companies signed a basic agreement on merger, and in August 2018 Aimetaru Technology absorbed Tohoku Sanwa Metal Co., Ltd. In April 2019 IJT Technology Holdings absorbed Aimetaru Technology, Jidosha Buhin Kogyo and TDF, and changed its trade name to IJTT Co., Ltd.; in June 2019 it relocated its head office to Yokohama, Kanagawa Prefecture. In April 2022 it listed on the Tokyo Stock Exchange Standard Market. In March 2024 it was delisted from the Tokyo Stock Exchange, and in April 2024, following a tender offer and other steps, it became a wholly owned subsidiary of ARTS-1 Co., Ltd. (established April 10, 2023). In October 2024 it merged with ARTS-1 as the surviving company and, on the same date, again changed its trade name to IJTT Co., Ltd. The history page notes that ARTS-1 was established with full investment by the Japan Monozukuri Mirai Fund, in which Sparkx Group, Toyota, Mizuho Bank and others participate, as a corporate collaboration project investing in Japanese manufacturing companies with superior technology, human resources and services to maintain and develop Japan's technological capabilities. The page also presents the histories of the predecessor companies: Jidosha Buhin Kogyo (1938–2019), Aimetaru Technology (1937–2019) and TDF (1918–2019).

A manufacturing company pursuing sustainable monozukuri, carbon neutrality and next-generation mobility, while applying precision machining technology to robot parts.

• I-beam front axle

  Axle component for small, medium and large trucks, supporting vehicle weights up to 25 tons and connecting left and right tires; produced in lengths of 1500–1800 mm and weights of 30–120 kg.

• Knuckle

  Component used in axles and steering for commercial and passenger vehicles, transmitting steering wheel operation to the tires; weighs about 10–40 kg and differs greatly in shape between independent and axle suspension systems.

• Hub & rotor assembly

  Component used in truck axles: the hub connects tire and body, the rotor is a key brake system part; produced for small trucks and some medium/large buses, with material selection through machining and assembly done in-house.

• Cylinder head

  One of the '5C' engine parts; its interior forms the combustion chamber and intake/exhaust ports, and various types for 4- and 6-cylinder engines are produced at the Kitakami plant.

• Cylinder block

  One of the '5C' engine parts, forming the cylinder bore and housing major moving parts such as pistons and crankshafts; various types for 4- and 6-cylinder engines are produced on dedicated lines at the Kitakami plant.

• Exhaust manifold

  Part of the exhaust system that safely and efficiently discharges combustion gas as exhaust; used in engines from vehicles to industrial/construction machinery, requiring high heat resistance and durability.

• Rocker arm

  Important part that opens and closes engine intake and exhaust valves; produced in a wide range for diesel engines of 2–16 L displacement used in commercial vehicles and industrial machinery.

• Propeller shaft

  Rotating shaft mainly used in 4WD and FR vehicles to transmit driving force to the differential gear; produced widely centered on Asian sites, with integrated design development through mass production and optional damping devices.

• Differential carrier

  Part serving as the case of the differential gear, a final drive component; produced in various sizes from commercial vehicles to wheel loaders and mining dump trucks, requiring high precision.

• Robot parts

  Per the corporate philosophy text, parts manufactured using precision machining technology to contribute to mass production and labor saving.

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