1923 Kanto Great Earthquake
Kanto Great Earthquake
1924 Road Act established, Meiji Jingu Gaien paving commenced
Road Act established, Meiji Jingu Gaien paving commenced
In 1925, the first automatic public telephone appeared in Tokyo, Osaka, and Yokohama
The first automatic public telephone appeared in Tokyo, Osaka, and Yokohama
Roads paved with Bitumars in 1928
Roads paved with Bitumars
1929 Great Depression
1929 Yokohama factory
Great Depression
Yokohama factory
In 1930, Japan Bitumars Co., Ltd. (now Tōa Road Industry Co., Ltd./reorganized in 1951) was established on November 28, Showa 5. It inherited the operating assets of its predecessor, Japan Liquid Asphalt Industry Co., Ltd., and was born as a Japan–U.S. joint venture. It was a manufacturer and distributor of the asphalt emulsion "Bitumars."
In 1930, the headquarters of Japan Bitumars Co., Ltd. was established
The first automatic traffic signal appeared at the Hibiya intersection in Tokyo
Establishment of Japan Liquid Asphalt Industry Co., Ltd. (predecessor)
Japan Bitumars Co., Ltd. (now Tōa Road Industry Co., Ltd.) was established
1934 Osaka factory
Osaka factory
Japan Bitumars Co., Ltd. (now Tōa Road Industry Co., Ltd.) was reorganized
In 1951, Japan Bitumars Co., Ltd. was reorganized into Tōa Road Industry Co., Ltd.
Tōa Road Industrial Co., Ltd. will exhibit at the Highway Techno Fair 2026, hosted by the Highway Research Association, a public interest incorporated foundation. The live exhibition will take place on November 26–27 from 10:00 to 17:00 at Booth A-029, West Hall 1 & 2, Tokyo Big Sight, and the online exhibition will run from November 19 to December 17.
Tōa Road Industrial Co., Ltd. participated as a title sponsor in the NAO'S FARM CUP 2026, hosted by former Japan national football team player Naohiro Ishikawa, held on October 3, 2026, in Iizuna Town, Nagano Prefecture. Details are provided in the attached documents.
A paper on measuring pavement deflection using a falling weight deflectometer (MWD) with embedded sensors developed by Toa Road Corporation won the 30th Japan Society of Civil Engineers Pavement Engineering Paper Award. Field tests achieved an average error of 2.3%. The results can improve road pavement maintenance and infrastructure management. The company plans to continue advancing pavement diagnostic technology using digital tools.
On July 6, 2026, at Rusutsu Resort in Hokkaido, Koji Kitazawa will hold a soccer clinic and pickleball experience event, with Toa Road Construction Co., Ltd. participating as a special sponsor.
Toa Road Industry is conducting a technical demonstration project for road asset management in the Philippines and Cambodia, contributing to the revitalization of markets in the Global South and environmental considerations.
Toa Road Construction Industry has signed a memorandum with Colas SA for information sharing and exchange of opinions on paving technology, advancing technological development toward a sustainable society.
Toa Road Construction participated in the United Nations WFP Association's support activities for school meals in developing countries and received a letter of appreciation.
Tōa Road Industry cooperated with a delegation from Cambodia's Ministry of Public Works and Transport and the Ministries of Economy, Finance, and Rural Development in a training session and study tour on road and irrigation maintenance and management reform strategy formulation.
Toa Road Industry, together with six partner companies, has developed a new asphalt mixture utilizing unused resources such as used toner and food recycling by-products.
Tōa Road Industry, together with six partner companies, developed a new asphalt mixture that utilizes unused resources such as used toner and food recycling by-products.