| 1946 |
|
| 1946 |
Founded Koken-sha Limited Company in Fukuoka City. |
| 1947 |
|
| 1947 |
|
| 1947 |
Reorganized into a corporation and renamed Koken Shiken Kogyo Co., Ltd. |
| 1947 |
Reorganized and renamed as Koken Shisui Co., Ltd. |
| 1948 |
|
| 1948 |
|
| 1948 |
|
| 1948 |
Relocated headquarters to Meguro Ward, Tokyo. |
| 1948 |
Headquarters moved to Meguro-Ku in Tokyo; A large boring machine was developed to research coal resources and supplied to coal mines like the Mitsui Miike coal mine. |
| 1949 |
|
| 1949 |
Japan’s first high-speed rotation machine, “KB drill,” was developed. |
| 1950 |
|
| 1950 |
Developed Japan's first high-speed rotary drilling machine, "KB Drill." |
| 1952 |
|
| 1952 |
|
| 1952 |
Delivered OE-type hydraulic drilling machine to the Tokyo Metropolitan Waterworks Bureau for the construction of Ogouchi Dam. |
| 1952 |
The hydraulic boring machine was supplied to the Tokyo Metropolitan Government Bureau of Waterworks for Ogauchi dam construction; A high-speed boring machine was supplied for Sakuma Dam. |
| 1954 |
Built Atsugi Factory in Atsugi Inland Industrial Zone, Kanagawa Prefecture. |
| 1957 |
|
| 1957 |
Moved headquarters from Meguro Ward to Nakano Ward. |
| 1957 |
The world’s first submarine boring machine was developed and supplied for research of undersea coal mines. |
| 1959 |
|
| 1959 |
|
| 1959 |
The first mixing plant in Japan was supplied for the Kurobe Dam construction. |
| 1960 |
Renamed to Mining Research Industries Co., Ltd. upon its 40th anniversary. |
| 1962 |
|
| 1963 |
|
| 1963 |
Established Mining Research Technical Training Center in Shinsyu Shiozumi Plateau. |
| 1964 |
|
| 1964 |
|
| 1964 |
Constructed the Suwa Factory in the Hara Village, Suwa District, Nagano Prefecture. Simultaneously, a new building was completed at the Shio-ne Training Center. |
| 1964 |
Japan’s first all-hydraulic boring machine was developed and supplied for subway construction in Tokyo. |
| 1965 |
Developed the world's largest rotary percussion drill, the RPD-200 model. |
| 1967 |
|
| 1967 |
A remote-controlled submarine boring machine, “Marine Drill,” was developed and supplied that was built on the research vessel “Hakuhō-Maru”; The first large borehole drilling machine, “BIGMAN BM-1,” was developed. |
| 1968 |
|
| 1968 |
|
| 1968 |
Developed the large-diameter rock drilling machine, the BM-150 model. |
| 1968 |
The Atugi factory was built at the industrial park in Atugi city, Kanagawa pref. |
| 1969 |
|
| 1969 |
One of the world’s largest horizontal boring machines, “FS-400,” was developed and supplied for Japan Railway Construction Public Corporation. |
| 1970 |
Developed the world's largest 5000m class horizontal boring machine, the FS-400 model, for advanced boring of the Seikan Tunnel, and delivered it to the Japan Railway Construction Public Corporation. |
| 1971 |
|
| 1971 |
The large borehole drilling machine “BIGMAN N” series was developed. |
| 1972 |
|
| 1972 |
|
| 1972 |
Developed the ultra-high pressure grout pump, the PG Pump. |
| 1972 |
One of the world’s largest mixing machines for prepacked concrete was developed with the Honshu-Shikoku Bridge Authority and supplied. |
| 1973 |
|
| 1973 |
|
| 1973 |
Established the Singapore Office (later Singapore Branch). |
| 1973 |
A super-high pressure grouting pump, “PG pump,” was developed; The first overseas office was established in Singapore. |
| 1974 |
|
| 1975 |
|
| 1975 |
Developed Japan's first all-hydraulic rotary percussion drill, the Road Drill RPD-1. |
| 1975 |
The first all-hydraulic rotary and percussion machine, “Arrow drill RPD-1,” was developed; The long-length horizontal boring machine “BED-100” was developed for advanced drilling in the Seikan Tunnel. |
| 1977 |
|
| 1977 |
|
| 1977 |
Developed the long-shaft horizontal drilling machine, the BED-100 model. |
| 1977 |
Shield raise boring machine “UPB-75” was developed; “Arrow drill RPD-65” was developed; The large borehole drilling machine “BIGMAN CIVIL RBB-100” was developed. |
| 1978 |
|
| 1978 |
A remote-controlled submarine boring machine, “Marine Drill,” was developed and supplied; “ICE DRILL MID-140” was developed and supplied to the National Institute of Polar Research for Antarctic research. |
| 1980 |
|
| 1980 |
Developed the Road Drill, the RPD-65 model. |
| 1981 |
|
| 1981 |
|
| 1981 |
Developed the large-diameter rock drilling machine, the Big Man Machine Building, the RBB-100 model. |
| 1981 |
Koken Technical Training Center was established in Shnsyu Enrei Plateau Park. |
| 1982 |
|
| 1982 |
Developed the seabed drilling machine, the Marindrill MD-500 model, and delivered it to the Metal Mining Agency of the Ministry of International Trade and Industry. |
| 1982 |
Headquarters moved from Meguro-ku to Nakano-ku in Tokyo; Koken’s maintenance department was developed and started as a spin-off; Full automatic concrete batching plant “Captain” was developed; “Down The Hole, Drill DD-10” was developed. |
| 1983 |
|
| 1983 |
Developed the ice drill, the MID-140 model, and delivered it to the Antarctic observation team. |
| 1984 |
|
| 1984 |
|
| 1984 |
Established the Mining Technology Training Center in the Shinshu Shio-ne Plateau. |
| 1984 |
A rotary percussion drill and rail-mounted grouting plant were supplied for tunnel construction of Baikal–Amur Mainline; Computer-controlled submarine boring machines “Marine Drill MDC-200/10” and “MDC-100/100AH” were developed and supplied. |
| 1985 |
|
| 1985 |
|
| 1985 |
Relocated the headquarters from Meguro Ward to Nakano Ward. |
| 1985 |
TG-NKK long-distance propulsion tunneling method and dedicated model “FS-120” was co-developed. |
| 1986 |
|
| 1986 |
|
| 1986 |
Formally separated and established the Mining Machine Service Co., Ltd., as a maintenance business division. |
| 1986 |
The computer-controlled boring robot “ADS-15” was co-developed; The company was renamed Koken Boring Machine Co., Ltd. at the 40th anniversary. |
| 1987 |
|
| 1987 |
Developed the fully automatic batch plant, the Captain. |
| 1988 |
|
| 1988 |
|
| 1988 |
Developed the Down-the-Hole Drill, the DD-10 model. |
| 1988 |
Koken Technical Training Center and a small earth science museum were built in Shnsyu Enrei Plateau Park. |
| 1989 |
|
| 1989 |
Delivered the Road Drill and train-type grout injection plant to the Soviet Union. |
| 1990 |
|
| 1990 |
Completed the computer-controlled seabed drilling Marindrill, the MDC-200/10 model, and the MDC-100/100AH model. |
| 1991 |
|
| 1991 |
|
| 1991 |
Jointly developed the G-NKK long-distance propulsion method and dedicated machine, the FS-120 model, with Nippon Steel Pipe and Tokyo Gas. |
| 1991 |
The first prototype machine aimed at Mars exploration was developed by the Institute of Space and Astronautical Science (ISAS) and partners. |
| 1992 |
|
| 1992 |
|
| 1992 |
Developed a computer-controlled boring robot "ADS-15" in collaboration with Tokyo Electric Power Company. |
| 1992 |
Koken Suwa factory was built in Nagano pref.; “Arrow drill RPD-200,” one of the largest rotary percussion drills, was developed. |
| 1993 |
|
| 1993 |
|
| 1993 |
Renamed the company to Mining Research Industries Co., Ltd. on the occasion of its 40th anniversary. |
| 1993 |
The raised boring machine “BM-150” was developed and used for Oku-kiyotsu power plant construction; A Percussion Wireline Sampler was developed. |
| 1994 |
|
| 1994 |
|
| 1994 |
Established a branch in Singapore. |
| 1994 |
Registered for Japan Securities Dealers Association (JSDA) and over-the-counter trading started. |
| 1995 |
|
| 1995 |
|
| 1995 |
Founded a research group aiming for Mars exploration and developed the first model. |
| 1995 |
Restoration work for The Great Hanshin-Awaji Earthquake Disaster; Koken acquired 100% stake in Kozo Kouji Co.; Japan Home Water System Co. was established. |
| 1996 |
|
| 1996 |
Constructed Suwa Factory. |
| 1997 |
|
| 1997 |
|
| 1997 |
Developed the world's largest rotary percussion drill "RPD-200". |
| 1997 |
Koken Earth Museum “地球の宝石箱” was built in Shiojiri-city, Nagano pref., for the 50th anniversary. |
| 1998 |
|
| 1998 |
|
| 1998 |
Developed large-diameter rock drilling machine "BM-150". |
| 1998 |
Koken Machine Service Co., Ltd was renamed Boring Techno Service Co., Ltd.; Meisho Co., Ltd was established. |
| 1999 |
|
| 1999 |
Delivered ice drill "MID-140" to Antarctic expedition team. |
| 2000 |
|
| 2000 |
|
| 2000 |
Registered stocks on the over-the-counter market. |
| 2000 |
The first overseas production bases were established. |
| 2001 |
|
| 2001 |
Participated in recovery work after the Great Hanshin Earthquake. |
| 2002 |
|
| 2002 |
|
| 2002 |
Acquired 100% of the shares of Structural Construction Co., Ltd. and made it a subsidiary. |
| 2002 |
Large raise boring work succeeded at Tsukumi mine, Oita pref., by Todaka Mining Co., Ltd. |
| 2003 |
|
| 2003 |
|
| 2003 |
Established Japan Home Water System Co., Ltd. for the development of household water wells. |
| 2003 |
The soil sampling machine “Sonic Drill ED-15” was developed; The sound-proof and super pulse vibration drilling machine “K-50” was developed; A multi-purpose crawler drilling machine “S-150” was developed. |
| 2004 |
|
| 2004 |
|
| 2004 |
Built the "Earth's Jewel Box" Museum Mining Research in Shiojiri City, Nagano Prefecture. |
| 2004 |
House foundation drilling machine “FSP-50AC” was developed; A sound-proof and super pulse vibration drilling machine “K-150” was developed; Over-the-counter trading ended and the company was listed on JASDAQ. |
| 2005 |
|
| 2005 |
Renamed the subsidiary Mining Machine Service Co., Ltd. to Bore Tech Service Co., Ltd. |
| 2006 |
|
| 2006 |
|
| 2006 |
Established an overseas production base in Malaysia. |
| 2006 |
Headquarters moved from Nakano-Ku to Toshima-Ku in Tokyo. |
| 2007 |
|
| 2007 |
Successfully completed the largest raise boring project in Japan (BM-500A type). |
| 2008 |
|
| 2008 |
|
| 2008 |
Developed new products such as samplers and drilling equipment. |
| 2008 |
The large borehole boring machine “BM-600” (outer diameter 6m) was developed. |
| 2009 |
Listed on the Jasdaq Securities Exchange. |
| 2010 |
|
| 2010 |
|
| 2010 |
Developed a hydraulic drill with a new drill head. |
| 2010 |
The horizontal directional boring machine “FSC-100” was developed; The company was listed on the new JASDAQ market after market reorganization. |
| 2011 |
Signed a capital and business alliance agreement. |
| 2012 |
|
| 2012 |
|
| 2012 |
Entered into agreements for acquisition and transfer of land and buildings. |
| 2012 |
All hydraulic rotary percussion drill “RPD-160C” was developed with a new drill head “KD-1200.” |
| 2013 |
|
| 2013 |
|
| 2013 |
Transitioned to the Standard market due to market restructuring. |
| 2013 |
The takeover of subsidiary Meisho Co., Ltd.; The company was listed on Tokyo Stock Exchange (TSE) JASDAQ “STANDARD”; The horizontal drilling machine “FS-120CZ” was developed. |
| 2014 |
|
| 2014 |
Developed the hydraulic drill "RPD-160C" equipped with a new drill head. |
| 2015 |
|
| 2015 |
|
| 2015 |
Absorbed subsidiary Meisho Co., Ltd. |
| 2015 |
Transition to a company with an audit and supervisory committee. |
| 2016 |
|
| 2016 |
Listed on the Tokyo Stock Exchange JASDAQ (Standard) following the merger of the Tokyo and Osaka Stock Exchanges. |
| 2016 |
Yangon branch established in Myanmar; The spindle-type boring machine “KT-100” was manufactured overseas. |
| 2017 |
|
| 2017 |
Transitioned to a company with an Audit Committee. |
| 2018 |
|
| 2018 |
|
| 2018 |
Developed the hydraulic drill "RPD-180C" equipped with a fourth-generation emission regulation engine. |
| 2018 |
All hydraulic rotary percussion drill “RPD-180C” was developed with an engine compliant with the 4th gas regulations in Japan. |
| 2019 |
|
| 2019 |
|
| 2019 |
Entered into a capital and business alliance agreement. |
| 2019 |
Capital and business alliance with Enbio Holdings, Inc. |
| 2020 |
|
| 2020 |
|
| 2020 |
Entered into agreements for acquisition and transfer of land and buildings. |
| 2020 |
Contract for acquiring land and buildings in Isehara Industrial Park and transferring land and buildings for Atsugi factory; Development of next-generation products focusing on safety, labor-saving, and productivity; Design and fabrication of medium-sized RPD machines, rod handling devices, pumps, and automated plants. |
| 2021 |
Commenced development of next-generation products. |
| 2022 |
|
| 2022 |
|
| 2022 |
|
| 2022 |
|
| 2022 |
Transitioned to the Standard market following the Tokyo Stock Exchange market restructuring. |
| 2022 |
Commenced operations at the Isehara plant. |
| 2022 |
Transitioned to the Standard Market due to Tokyo Stock Exchange market reorganization. |
| 2023 |
Acquired 100% of the shares of Kristensen Mykai Co., Ltd. |
