| 1935 |
Foundation of Kaneta Group |
| 1935-04 |
(Showa 10): Founded Kaneshita-gumi |
| 1951 |
Reorganization of Kaneta Group, establishment of Kaneta Construction Co., Ltd., capital of 1 million yen |
| 1951-04 |
(Showa 26): Reorganized Kaneshita-gumi and established Kaneshita Construction Co., Ltd., with capital of 1 million yen |
| 1951-04-10 |
Established: April 10, 1951 |
| 1954 |
Expansion into road paving construction, new asphalt plant (currently Tango Ascon Factory) established in Sutsu, Miyazu City |
| 1954-07 |
(Showa 29): Expanded into road paving work, established an asphalt plant (currently Tango Ascon Factory) in Sutsu, Miyazu City |
| 1955 |
Open Osaka Branch (currently Osaka Office) in Osaka City |
| 1955-12 |
(Showa 30): Opened Osaka Branch (currently Osaka Branch Office) in Osaka City |
| 1956 |
Open Kyoto Branch (currently Kyoto Office) in Kyoto City |
| 1956-03 |
(Showa 31): Opened Kyoto Branch Office in Kyoto City |
| 1959 |
Capital increased to 12 million yen |
| 1959-12 |
(Showa 34): Capital increased to 12 million yen |
| 1960 |
Expansion and strengthening of the architectural division, solidifying the system as a comprehensive construction company |
| 1960-04 |
(Showa 35): Expanded and strengthened the construction division, solidified the system as a comprehensive construction company |
| 1961 |
Capital increased to 60 million yen |
| 1961 |
New asphalt plant (currently Tajima Ascon Factory) established in Yoka-cho (currently Yabu City) |
| 1961-05 |
(Showa 36): Capital increased to 60 million yen |
| 1961-09 |
(Showa 36): Established an asphalt plant (currently Tamba Ascon Factory) in Yoka-cho (now Yabu City) |
| 1962 |
New asphalt plant (currently Tamba Ascon Factory) established in Tamba-cho (currently Kyotamba Town) |
| 1962-07 |
(Showa 37): Established an asphalt plant (currently Tamba Ascon Factory) in Tamba-cho (now Kyotamba-cho) |
| 1963 |
Toyo City, Hyogo Prefecture, opened Toyooka Branch (currently Hyogo Branch) |
| 1963 |
Capital increased to 120 million yen |
| 1963-08 |
(Showa 38): Opened Toyooka Branch (currently Hyogo Branch) in Toyooka City, Hyogo Prefecture |
| 1963-12 |
(Showa 38): Capital increased to 120 million yen |
| 1971 |
Capital increased to 180 million yen |
| 1971-07 |
(Showa 46): Capital increased to 180 million yen |
| 1972 |
Listed on Kyoto Securities Exchange, capital increased to 240 million yen |
| 1972 |
Capital increased to 300 million yen |
| 1972-07 |
(Showa 47): Listed on the Kyoto Securities Exchange, capital increased to 240 million yen |
| 1972-12 |
(Showa 47): Capital increased to 300 million yen |
| 1973 |
Listed on the Osaka Securities Exchange Second Section, increased capital to 400 million yen |
| 1973-07 |
(Showa 48): Listed on the Osaka Securities Exchange Second Section, capital increased to 400 million yen |
| 1974 |
Obtained construction minister's license for civil engineering, construction, paving, and waterworks facilities |
| 1974 |
Separated and established the ready-mixed concrete manufacturing and sales division as Takara Concrete Industry Co., Ltd. |
| 1974-01 |
(Showa 49): Obtained construction minister's license for civil engineering, architecture, paving, and waterworks projects |
| 1974-03 |
(Showa 49): Separated and established Hashidate Ready-Mixed Concrete Industry Co., Ltd., a division for manufacturing and selling ready-mixed concrete |
| 1976 |
Increased capital to 500 million yen |
| 1976-07 |
(Showa 51): Capital increased to 500 million yen |
| 1979 |
Increased capital to 650 million yen |
| 1979-01 |
(Showa 54): Capital increased to 650 million yen |
| 1987 |
Increased capital to 1 billion yen |
| 1987-01 |
(Showa 62): Capital increased to 1 billion yen |
| 1988 |
Separated and established the design, survey, and surveying division as Sogo Giken Co., Ltd. |
| 1988-03 |
(Showa 63): Design, survey, and surveying divisions separated and established as Sogo Giken Co., Ltd. |
| 1990 |
Introduced SF greening method and expanded into slope greening business |
| 1990-06 |
(Heisei 2): Introduced SF greening method and expanded into slope greening business |
| 1991 |
Installed recycling equipment at Tango Ascon Factory |
| 1991 |
Started industrial waste disposal business |
| 1991-04 |
(Heisei 3): Recycle equipment installed at Tango Ascon factory |
| 1991-06 |
(Heisei 3): Started industrial waste disposal business |
| 1996 |
Established Seki Construction Co., Ltd. |
| 1996-04 |
(Heisei 8): Established Saki Construction Co., Ltd. |
| 1999 |
Obtained ISO 9001 certification for quality assurance |
| 1999-12 |
(Heisei 11): Acquired ISO 9001 certification for international quality assurance standards |
| 2001 |
Installed recycling equipment at Tamba Ascon Factory |
| 2001-10 |
(Heisei 13): Recycle equipment installed at Tajima Ascon factory |
| 2002 |
Obtained ISO 14001 environmental certification |
| 2002-08 |
(Heisei 14): Acquired ISO 14001 environmental certification |
| 2004 |
Obtained real estate transaction license |
| 2004 |
Added 13 construction industry permits under the Building Business Act |
| 2005-07 |
(Heisei 17): Additional permission for 13 construction industry categories under the Construction Business Act |
| 2005-11 |
(Heisei 17): Obtained real estate transaction license |
| 2009 |
Obtained real estate transaction license |
| 2010-10 |
(Heisei 22): Obtained real estate transaction license |
| 2013-07 |
(Reiwa 5): Listed on the Second Section of the Tokyo Stock Exchange following the integration of spot markets with Osaka Securities Exchange |
| 2014 |
Listed on the Tokyo Stock Exchange Second Section following the integration of spot markets with the Osaka Securities Exchange |
| 2022 |
Transitioned to the |
| 2022-04 |
(Reiwa 4): Transitioned to the |
| 2024 |
Opened a conveyor belt sushi restaurant in Miyazu City, Kyoto Prefecture, and entered the food and beverage industry |
| 2024-03 |
(Reiwa 6): Opened a conveyor belt sushi restaurant in Miyazu City, Kyoto Prefecture, and entered the food service industry |
