Maruken Road Co., Ltd. Hidaka Tenma Ascon

Established on February 24, 1950

Registration with the Minister of Construction (Permit No. 3503)

Capital increased to 3 million yen

Osaka Sales Office opened

Sapporo Sales Office opened

Tokyo Branch opened

Promoted to Sapporo Branch

Ogifushi asphalt mixing plant installed (Nikko, 25 t/h)

Capital increased to 80 million yen

Company name changed to Taiwa Road Co., Ltd.

Capital increased to 86.26 million yen

Company name changed to Inamura Road Co., Ltd.

Erimo mixing plant installed (Nikko, 35 t/h)

Company name changed to Maruken Road Co., Ltd.

Takamatsu mixing plant installed (Niigata, 70 t/h)

Betsukai mixing plant installed (Tokyo Koki, 35 t/h)

New building for the Kanazawa head office completed

Registration with the Minister of Construction [Permit No. (Special) 2426]

Asahi mixing plant installed (Niigata, 70 t/h)

30th anniversary of founding

Construction of the Noto branch office

Construction of the Nanao branch office

40th anniversary of the company’s founding

Patent application for the CGR method

Capital increase (new capital: ¥224.27 million)

Nanao asphalt mixing plant installed (NIKKO, 60 t/h)

50th anniversary of the company’s founding

ISO 9002 certification (transitioned to ISO 9001 in 2003)

ISO 14001 certification

60th anniversary of the company’s founding

Kisarazu branch office opened

70th anniversary of the company’s founding

Kisarazu branch office closed

Sapporo branch office and Sapporo branch consolidated

Nanao Ascon Joint Venture established following discussions between Maruken Road Co., Ltd. and Yoshida Road Co., Ltd.

Nanao Ascon commenced operations

Betsukai Ascon Joint Venture established following discussions among Obayashi Road Co., Ltd., Mitsui Sumitomo Road Co., Ltd., and Maruken Road Co., Ltd.

Betsukai Ascon commenced operations