| 1943 |
Tadao Kamijyo started “KAMIJO BOSAI KOGYOSHO”, a tunnel waterproofing business, in Akita Pref. |
| 1947 |
Raito Bousui Eki, proprietary quick set mortar sealing liquid, was developed. |
| 1948 |
RAITO BOSAI KOGYOSHO CO., LTD., named after the sealing liquid, was founded in Sendai, Miyagi Pref. |
| The first original shotcrete machine was developed. |
| 1950 |
The first slope protection work was completed using Raito shotcrete machine. |
| 1951 |
The company name was changed to “RAITO KOGYO CO., LTD.” and the head office was moved to Kudan, Tokyo. |
| 1954 |
The first grouting work was carried out to improve bridge pier foundation. |
| 1958 |
The first overseas waterproofing work was carried out in Taiwan. |
| 1959 |
“Rapid greening” hydroseeding method was tested on site. |
| 1961 |
Listed in the second section of Tokyo Stock Exchange. |
| 1963 |
Raito’s proprietary “RG pile method” was adopted in the Subway Ginza Line Project. |
| 1971 |
Chemical grouting method was introduced from Soletanche Entereprise, France. |
| 1972 |
Shotcrete robot system was introduced from Stabilator Corporation, Switzerland. |
| 1973 |
Technical Research Laboratory was established in Narashino, Chiba Pref. |
| 1974 |
Listed in the first section of Tokyo Stock Exchange. |
| 1975 |
“Prestressed Anchor method” was introduced from Soletanche Enterprise. |
| 1980 |
“Quatre Vingt” hydromulching method, effective for rock slope greening, was
developed. |
| 1981 |
“PLUSS” pipe laying method was introduced from Soletanche Enterprise. |
| 1982 |
“RSW Column” 4 shaft soil-cement column method was developed. |
| 1984 |
“Silacsol” high-durablility grout was introduced from Soletanche Entereprise. |
| 1988 |
“Enpasol” ground investigation system was introduced form Soletanche Entereprise. |
| 1989 |
“Strip-reinforcing Earth Method” was developed. |
| 1992 |
“UNILAP”, high head pumping delivery system for shotcreting, was developed. |
| 1993 |
“RAS Column”, a proprietary deep soil mixing method, was developed. |
| 1995 |
“Ecocycle Greening”, a slope greening method using recycled materials, was developed. |
| 1996 |
“Rock Bonding Method”, a method to prevent fragile rocks from falling, was
developed. |
| 1997 |
“RAITO, INC.”, a U.S. based ground improvement contractor, was founded as
100% subsidiary. |
| 1998 |
“Maxperm Grouting Method”, a grouting method especially effective to prevent
liquefaction was developed. |
| ISO9001 was certified to Tokyo Branch, followed by all the other branches. |
| “Roving Wall” continuous-fiber reinforced soil method was developed. |
| 1999 |
Technical Research Laboratory was certified as a public laboratory for environmental quantitative analysis. |
| Environmental investigation and remediation business was launched. |
| 2000 |
“UNILAP Method” received technical certification from the Japan Construction
Mechanization Association. |
| 2001 |
“RAS Column Method” received technical certification from Society of Materials
Science, Japan. |
| High-durability grout material “Silacsol-UF” received technical certification
from Society of Materials Science, Japan. |
| Morioka branch received ISO14001 certification, followed by the head office and other branch offices. |
| “All Greening”, an environmental-friendly thick plant-base spray installation method
for slope greening, was developed. |
| 2002 |
SolData, K.K. was founded to enter into monitoring and instrumentation market – a joint company with Solentanche
Bachy group. |
| 2003 |
“Roving Wall Method” received technical certification. |
| 2004 |
“Obijime Method”, a slope stabilization method using geosynthetic obi-band,
was co-developed with P.S Mitsubishi Construction Co., Ltd. |
| “Continuous Rock-sounding System”, an upgraded “Enpasol” ground investigation
system, was developed. |
| “ELPS” advance tunnel support method was co-developed with Shimizu Construction
Co., Ltd. |
| “Old Building Diagnostic System” using infrared thermography was developed. |
| 2005 |
Raito Singapore Pte Ltd was established as Raito's 100% subsidiary. |
| Execution control system for Soil Mixing Wall was developed. |
| Yasasiite Ratio Co., Ltd. was established to enter elderly care market. |
| “PLUSS” pipe-laying method received technical certification. |
| “RSI Ground Anchor” method received technical certification. |
| 2006 |
Natural disaster damage information network was started in service. |
| “3D Protection Panel” method was introduced from Europe |
| “RMP-J” method based on 2-shaft jet grouting system was developed. |
| Composite pulsing grout injection system was developed jointly with Shimizu Corporation. |
| Liquefaction resistant “Hat Ring” manhole installation method was developed jointly with Chichibu Concrete Co., Ltd. |
| 2007 |
“EcoClay Wall” in-situ cutoff wall installation method received technical certificate |
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