Light Industry Co., Ltd.

Engaging in tunnel waterproofing projects

Yui Uekami founded "Uekami Waterproofing Industry" in Hanawa Town, Akita Prefecture: engaged in tunnel waterproofing

Moved to Aomori City and renamed to "Tohoku Waterproofing Industry"

Developed rapid-setting mortar liquid, named after the company's name as Light Waterproof Liquid

First president appointed: Yuuichi Ujō; completion of the first mortar spraying machine

Established Corporation, named "Light Waterproof Industry Corporation," headquartered in Sendai: Yui Uekami appointed as first president: completed first mortar spraying machine

Patent registration of rapid-setting cement liquid (Light Liquid)

Carried out the first slope protection work using mortar spraying machine (railway slope near Sendai): patented rapid-setting liquid for cement (Light Liquid)

Changed company name to "Light Industry Co., Ltd." and relocated headquarters to Tokyo (Kudan)

Started subgrade (railway bed) pressure injection work

Constructed the first injection concrete work (bridge pier)

Carried out the first waterproofing work overseas (Taiwan)

Conducted test work for "Rapid Greening Method" (seed spraying method)

RG Pile (Vibration-free and Noise-free In-place Piling) No. 1 Machine Completed

Patent registration of the Light-style seed spraying method

Listed on the Tokyo Stock Exchange Second Section: "Light Type Seed Spraying Method" Patent Registered

Received "Science and Technology Development Incentive Fund" from the Science and Technology Agency for research and development of "Greening Method"

The 'Grid-frame block combined seed spraying method' received the Minister of Science and Technology Award; the 'RG pile method' was implemented in the Ginza Line subway construction

Head Office Equipment Center Completed (Makuhari, Chiba Prefecture): "Lattice Frame Block Combined Seed Spraying Method" awarded the Minister of Science and Technology Agency's Prize: "RG Pile Method" implemented in Ginza Subway Line Construction

Second president appointed: Yoshiharu Sagara

"Mortar Ejection Device" received National Invention Award: Yoshiharu Sumaru appointed as Second President

Implemented "RG Pile Method" in Chiyoda Subway Line Construction

Technical alliance agreement with French company Soltancho regarding "Ground Improvement Method"

Third president appointed: Takashi Nagatomo

Research Institute Completed (Narashino, Chiba Prefecture): Takashi Nagatomo appointed as Third President

Reclassified to First Section of Tokyo Stock Exchange

Introduced "Pre-stressed Anchor Method" from Soltancho

Developed the ground improvement 'Silica Lizer injection method'

Yasuo Yamada appointed as Fourth President: Developed "Silica Lizer Injection Method" for Ground Improvement

Fifth president appointed: Saizō Maruyama

Head Office Equipment Center Relocated (Ishibashi, Tochigi Prefecture): Masaru Maruyama appointed as Fifth President

Developed Four-Axis Soil Cement Column Wall Method "RSW Method"

Light Industry Baseball Team Won Emperor's Cup Softball Tournament

Technical alliance with Soltancho for Permanent Ground Improvement Method "Shiraksol"

Developed "Lapping Shot Method" (Fiber Reinforced Sprayed Greenery): Technical alliance with Soltancho for Ground Condition Monitoring System "Empasol"

Developed "Strip Reinforced Soil Method"

Long-distance, high-strength material pumping method: 'Uniwrap method'

Developed "Unilap Method"

Mechanical mixing method: 'RAS column method'

Celebrating 50th Anniversary, Logo Mark Redesigned with V.I. Introduction: Developed "RAS Column Method" for Ground Improvement

RSI ground anchor method

Recycle system: 'Eco Cycle greening method'

"RSI Ground Anchor Method": "Eco Cycle Greening Method"

Rock mass joint reinforcement method

Developed "Rock Mass Joint Reinforcement Method (Rock Mass Collapse Countermeasure Method)"

"Rock Mass Joint Reinforcement Method"

Established the US subsidiary "RAITO.Inc" (ground improvement construction company)

Liquefaction prevention method: 'Max Palm method'

Long-fiber reinforced soil integration method: 'Lowbing Wall method'

Developed ground reinforcement and liquefaction prevention method "MaxPalm Injection Method"; Developed chemical injection material "EcoSilica"; Developed long fiber reinforced soil greening method "Loving Wall Method"; Obtained ISO9001 certification at Tokyo branch (later obtained at all branches)

Liquefaction prevention method: "Max Palm Method": "Loving Wall Method"

Wingspan mechanical mixing method: 'Open Wing method'

The technical research institute obtained registration for analysis-related metrological certification business; Entered soil and groundwater contamination countermeasure business (integrated system from investigation to restoration)

Environment-friendly spray greening method: "All Greening Method"

Developed environmentally friendly spray greening method "All Greening Method"

Obtained ISO14001 certification at headquarters division

Waterproof wall construction method: "EC (Eco Clay) Wall Method"

Curved drilling method: "Conduction Navi Method"

Developed environmentally friendly waterproof wall method "EC (EcoClay) Wall Method"; Developed three-dimensional drilling technology "Conduction Navi Method"

Waterproof wall construction method: "EC (Eco Clay) Wall Method": "Conduction Navi Method"

Tunnel ultra-long length method: "ELPS (Elps) Method"

Developed "Empasor" ground investigation; Developed "Rock Mass Continuous Sounding System"; Co-developed tunnel super-long method "ELPS Method"; Developed "Thermal Infrared Aging Building Diagnosis System"

Construction management system for column-row underground continuous wall method

Developed "Columnar Continuous Wall Construction Management System"; Introduced technology for "AlphaZol G Injection Method"; Established "Yasashii Te Light Co., Ltd." to enter caregiving services business

Construction management system for "Column Type Continuous Wall Method"

Slope coloring method

Dual-axis high-pressure jet stirring: "RMP-J Method"

Composite dynamic injection method

Developed "Slope Coloring Method"; Introduced European technology for "3D Protection Panel Method"

"Slope Coloring Method": "RMP-J Method": "Composite Dynamic Injection Method"

Refresh method

Introduced "SSI Method" and "N-SSI Method" from JR Soken Engineering; Developed high-capacity jet-assisted mechanical mixing method "RMP-J Method"; Developed "Composite Dynamic Injection Method"; Introduced "Hatring Method" for manhole flotation prevention from CS Engineers; Established construction division (now: Construction Business Headquarters)

"No Refill Method"

Large-depth column-row continuous wall: "A-VECS Method"

OPT Jet Method

Developed "OPT Jet Method"; Developed "Bore Bending Correction Method A-VECS" for columnar continuous wall method "RSW Method"; Developed "ACTM Method"; Developed "ES Net Method"; Developed impact navigation system for "Conduction Navi Method"; Elected Tetsuji Tamura as 8th president

Deep Column Continuous Wall: "A-VECS Method": "OPT Jet Method"

ES Net Method

Developed "New Jet Method JEP-L, JEP-M"; Developed "RCG Method" for cavity filling

"ES Net Method"

Lift-off automatic testing system

Large-diameter displacement-suppressing two-axis ground improvement: "RMP-MST Method"

Hiroyuki Irie appointed as 9th president; Developed high-pressure cutting permeation injection method "KHI Method"; Developed "Polymer Cement Mortar Spraying System" for existing drainage tunnel lining; Developed "Cutting Situation Confirmation System" for high-pressure jetting stirring method

"Lift Off Automatic Test System": "RMP-MST Method"

Displacement-suppressing injection method: "Non-Up Injection Method"

Long-distance compatible Conduction Navi method

High-energy absorption fence: "High Jule Net Method (for soil and rock)"

Developed "Small Polymer Cement Mortar Spraying System" suitable for small cross-section tunnels with about 2m hollow section; Developed "Intermediate Layer Mixing Treatment Machine Guidance System" for ICT ground improvement

Displacement Suppression Injection Method "Non-Up Injection Method": Long-Distance Compatible Conduction Navi Method": High Energy Absorption Fence "High Jule Net Method (for Sand and Gravel)"

Concrete spalling prevention method: "Duiｃ Method"

Ground reinforcement soil method: "Lotus Anchor Method"

Kazuo Suzuki appointed as 10th president; Developed concrete spalling prevention method "Duic Method"; Developed ground reinforcement soil method "Lotos Anchor Method"

Concrete Spalling Prevention Method "Duic Method": Rock Reinforcement Soil Method "Lotus Anchor Method"

Narrow ground compatible "Mega Jet M3 Method"

New Blender for SCM Construction Method: "Rotary Blender Z"

Slope Surface Machinery Construction Technology: "Robo-Shot"

Developed "Mega Gaget M3 Method" for narrow sites; Developed new blender "Rotary Blender Z" for SCM method; Developed "Robo-Shot Method" for mechanized slope construction

Narrow Space Compatible "Mega Gadget M3 Method": New Type Blender for SCM Method "Rotary Blender Z": Slope Mechanical Construction Technology "Robo-Shot"

Quality and Shape Visualization System for Ground Improvement Applying ICT and CIM: "3D-Vim System"

Developed "3D-ViMa System" for quality and shape visualization of ground improvement applying ICT and CIM; Completed new headquarters building

Quality and shape visualization system for ground improvement applying ICT and CIM "3D-ViMa System"

Machine Guidance: Construction Management System: "GNSS Steering System"

Slope Shape Measurement System: "SlopeVision"

Developed "GNS Steering System" for combined machine-guided construction management; Developed "Slope Vision" measurement system for slope shape; Completed new West Japan branch building

■ Machine guidance: Construction management combined system: 'GNSS Steering System' : ■ Surface shape measurement system 'SlopeVision'

Retaining Wall Construction: "Star D Frame Construction Method"

Resurfacing Method: "Resin Spraying Type"

High-Pressure Jet Mixing Method: Construction Management System: "ICT-JET"

Developed "Stardif Frame Method" for retaining walls; Developed "Resin Spraying Type" refresh method; Developed "ICT-JET" construction management system for high-pressure jet stirring method; Published company history "The History of Light Industry Co., Ltd."

■ Retaining wall construction: 'Star-D Frame Method' : ■ Refreshing method: 'Resin spray type' : ■ High-pressure spray stirring method: Construction management system: 'ICT-JET'

High-Performance Slope Protection: "Multi Slope Method"

Material Transport System: "Material Transport System Using UAV"

ICT Drilling System: "Remote Sky Drill: (Wireless Remote-Controlled Backhoe Drill)"

Raito: Enpasol Advanced Drill: "Enpasol Dedicated: Fully Automatic Survey Machine: READ-30"

Developed "Multi Slope Protection Method"; Developed "UAV Material Transport System"; Developed "Remote Sky Drill" wireless remote-controlled backhoe drill for drilling system; Developed "Empasor Dedicated Fully Automatic Survey Machine READ-30"; Opened R&D Center

■ High-performance slope protection work: 'Multi-slope Method' : ■ Material transport system: 'Material transport system using UAV' : ■ ICT drilling system: 'Remote Sky Drill (wireless-operated backhoe drill)' : ■ Raito: Enpasol Advanced Drill: 'Enpasol exclusive: fully automatic survey machine: READ-30'

ICT Slope Construction (Retaining Wall Construction): "Utilizing Point Cloud Data: Slope Shape Measurement System"

Curve Pipe Proof Construction: "Drilling Position Monitoring System"

Development of ICT slope face construction (retaining wall) "Point Cloud Data-Based Slope Shape Measurement System": Development of Curve Pipe Proofing Work "Hole Monitoring System"

■ ICT slope work (retaining wall construction): 'Point cloud data-based slope shape measurement system' : ■ Curved pipe proof work: 'Drilling position monitoring system'

High-Pressure Cutting Penetration Injection Method: "KHI Method"

Existing Waterway Tunnel Lining Construction: "Polymer Cement Mortar Spraying System"

High-Pressure Jet Mixing Construction: "Cutting Condition Confirmation System"

Appointed the 11th President, Kazuhiro Akutsu: Completion of the New Tohoku Branch Building: Development of High-Pressure Cutting Penetration Injection Method "KHI Method": Development of Existing Water Conduit Tunnel Lining System "Polymer Cement Mortar Spraying System": Development: Development of High-Pressure Jet Mixing Method "Cutting Status Confirmation System"

■ High-pressure cutting penetration injection method: 'KHI method' : ■ Existing drainage tunnel lining work: 'Polymer cement mortar spray system' : ■ High-pressure spray stirring method: 'Cutting condition confirmation system'

ICT Measurement System to Streamline Measurement and Shape Management in Anchor and Rock Bolt Construction: "ICT Drilling Management System"

Fully Automatic Spraying System Achieving Construction Efficiency Beyond Skilled Workers: "Automatic-Shot R"

Wireless Remote-Controlled Backhoe Drill with Bolt Insertion Function: "Remote Sky Drill"

■ ICT measurement system 'ICT Drilling Management System' that streamlines measuring and shape management in anchor and lockbolt work : ■ Fully automatic spray system 'Automatic-Shot R' that achieves construction efficiency surpassing skilled workers : ■ Wireless-operated backhoe drill 'Remote Sky Drill with bolt insertion function'

Small cross-section tunnel with an internal cross-section of about 2m can be handled by the "Small Polymer Cement Mortar Spraying System"

"Mid-layer Mixing Treatment Machine Guidance System" for ICT ground improvement work

Development of "Small Polymer Cement Mortar Spraying System" suitable for small cross-section tunnels with an internal diameter of about 2m: Development of "Intermediate Layer Mixing Treatment Machine Guidance System" for ICT ground improvement work

■ Small polymer cement mortar spray system capable of handling small-section tunnels with internal cross-section of about 2m : ■ ICT ground improvement work compatible 'Middle-layer mixed treatment machine guidance system'

"Remote Maintenance Cloud System" that oversees the nationwide operation of the fully automatic spraying system Automatic-Shot R

"ACS System" that automatically optimizes the cement slurry discharge amount of the mechanical agitation type ground improvement method

"QuickDrafter" that automatically creates drawings of anchor drilling positions for bridge seismic reinforcement work

Appointed the 10th President, Kazuwo Suzuki: Development of "QuickDrafter" that automatically creates drawings of anchor drilling positions for bridge seismic reinforcement work: Overseeing the nationwide operation of fully automatic spraying system Automatic-Shot R: Development of "Remote Maintenance Cloud System"

■ Remote maintenance cloud system that oversees nationwide operation of fully automatic spray system Automatic-Shot R : ■ ACS system that automatically optimizes cement slurry discharge volume in machine-stirred ground improvement method : ■ QuickDrafter that automatically drafts anchor drilling positions for bridge seismic reinforcement work

"CCS Cloud," a total management system for chemical injection work that realizes real-time management

"Clean Drill GX," a slope drilling machine that balances ICT and decarbonization

Completion of the new Chubu Branch Building: Development of "CCS Cloud," a total management system for real-time management of chemical injection work: Development of "Clean Drill GX," a slope drilling machine that balances ICT and decarbonization

■ CCS Cloud, a total management system for chemical injection works that enables real-time management (CCS: Computerized Control System) : ■ Clean Drill GX, a surface drilling machine that combines ICT and decarbonization

Promoting labor saving through automatic weighing and feeding system: "Vegetation Substrate Compatible Automatic-Shot R"

Expanding the application of chemical injection method in sandy ground: "Shear Penetration Method"

Using DX technology to utilize past cases and prevent disasters and troubles: "Light Safety Navi (Safety Alert App)"

Promotion of labor-saving through automatic weighing and feeding system: Development of "Vegetation Substrate Compatible Automatic-Shot R": Expansion of application of chemical injection method in sandy ground: Development of "Shear Penetration Method": Use of DX technology to prevent disasters and troubles by utilizing past cases: Development of "Light Safety Navi (Safety Alert App)": Development of "Double Pipe Construction Remote Sky Drill" aimed at improving efficiency and safety in slope borehole pipe construction: Improving construction efficiency through remote construction management: Development of "ICT Drilling Management System Remote Function"

■ Promotes labor reduction through automatic weighing and dispensing system: 'Vegetation substrate-compatible Automatic-Shot R' : ■ Expands application of chemical injection method in sandy ground: 'Shear penetration method' : ■ Prevents disasters and troubles by leveraging past cases with DX technology: 'Light Safety Navi (safety alert app)'