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  1. Home
  2. Construction Consultant
  3. LNSJAPAN
Construction Consultant
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LNSJAPAN

EstablishmentJuly 1, 2010
capital750Ten thousand
number of employees5
addressNiigata/Chuo-ku, Niigata-shi/3-11-2 Atago
phone025-250-7265
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last updated:Aug 17, 2026
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  • Products/Services(17)
  • catalog(34)
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LNSJAPAN Company Profile

The revolutionary LOCK-N-STITCH method for metal crack repair does not cause thermal deformation or secondary cracking, which have been issues with traditional welding repairs.

<We provide nationwide support> LNS JAPAN Co., Ltd. is an engineering company that performs maintenance and repairs of equipment and metal structures in various industries (such as petroleum, chemicals, power generation facilities, ships, heavy machinery, automobiles, steelmaking, etc.) using the METAL STITCHING method. Currently, most of the critical equipment used across industries is facing a challenging situation for new capital investment due to the global economic downturn. In Japan's industries, welding technology, which is widely used for metal repairs, has recently led to significant damage to many pieces of equipment and critical assets due to a shortage of skilled craftsmen and inexperienced welding repairs, with many cases worsening. Our company is the only certified company in Japan and is committed to continuous technological development in collaboration with our parent company, LOCK-N-STITCH INC, which continues to leap and grow as a global enterprise. We promise to ensure thoroughness for extending the life of equipment and providing high-quality and rapid maintenance by avoiding issues such as deformation from heat and secondary cracking, which have been problems with traditional welding repairs, while also achieving shorter construction periods and lower repair costs. For repairs where you want to avoid using fire or where time is limited, please contact LNS JAPAN.

Business Activities

- Repair of cracks and fractures in metal equipment such as castings using special screws (overseas support) - Repair of damaged bolt holes (female threads) - Reinforcement repairs of metal equipment - Sale of equipment, tools, and products What is the LNS method of the new crack repair technology "LOCK-N-STITCH"? Metal Stitching technology is a method that repairs broken or cracked castings and metal products without welding, using specially designed screws and reinforcement locks to stitch them together. The specially designed screws generate a pulling force that counters the tendency of the base material to spread apart, creating a high tensile strength repair method by adding locks that can withstand tensile forces better than the original base material. Additionally, this repair method can maintain perfect airtightness (screw overlap work). LNSJAPAN uses specially designed Full-Torque inserts for permanent repairs in bolt holes where fractures or cracks have occurred. **Benefits of LNS Technology** 1. Repairs can be done quickly 2. Consistent quality of work can be achieved 3. Clean surface treatment is possible 4. High-pressure airtightness can be maintained 5. Does not cause thermal distortion or secondary cracks.

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Products/Services (17)

For metal cracks, 【LNS method】 crack repair without applying heat. product image
For metal cracks, 【LNS method】 crack repair without applying heat.
If it's a metal crack, 【LNS method】 crack repair without applying heat. product image
If it's a metal crack, 【LNS method】 crack repair without applying heat.
New technology for metal crack repair without using fire: "LOCK-N-STITCH" product image
New technology for metal crack repair without using fire: "LOCK-N-STITCH"
If it's a metal crack, 【LNS Method】 Power Generation Equipment Case Study product image
If it's a metal crack, 【LNS Method】 Power Generation Equipment Case Study

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catalog(34)

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Fire-free crack repair

Fire-free crack repair

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Pump casing crack repair

Pump casing crack repair

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Cement plant

Cement plant

TECHNICAL
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Metal Crack Repair Technology LOCK-N-STITCH Construction Record 13-9

Metal Crack Repair Technology LOCK-N-STITCH Construction Record 13-9

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news(1)

CIMG1697.jpg

The new technology for crack repair without using fire, "LOCK-N-STITCH," is LNS JAPAN.

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Repairs in locations where fire cannot be used and repairs that cannot afford downtime have been impossible to solve with conventional techniques, but our special screws can address these issues. Additionally, welding has a high risk of thermal distortion and secondary fractures, whereas the LNS method provides a permanent repair. What is the LNS method? Metal Stitching technology is a technique that repairs broken or cracked castings and metal products without welding, using specially designed screws and locks to "stitch" them together. The specially designed screws generate a pulling force that counteracts the tendency of the base material to spread, in contrast to conventional screws that disperse force. This method includes the installation of locks with high tensile strength, making it more resistant to tensile forces than the original base material. It also allows for perfect maintenance of airtightness (through screw overlap work). Furthermore, LNS JAPAN uses specially designed Full-Torque inserts for permanent repairs on stripped screw holes, cracks, and bolt hole issues.

Feb 16, 2012

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Detailed information

Company name LNSJAPAN
number of employees5
Contact addresspostalcode 950-0944 Niigata/ Chuo-ku, Niigata-shi/ 3-11-2 AtagoView on map TEL:025-250-7265 FAX:025-250-7262
Key PartnersKomatsu Machinery Co., Ltd., H&F Co., Ltd., Ube Industries, Ltd., Komatsu Machinery, Komatsu, DU Co., Ltd., Mitsubishi Heavy Industries, Ltd., Tokyo Electric Power Company, Mitsubishi Materials Corporation, Pacific Cement Co., Ltd., etc.
Komatsu Machinery Co., Ltd., H&F Co., Ltd., Ube Industries, Ltd., Komatsu Machinery, Komatsu, DU Co., Ltd., Mitsubishi Heavy Industries, Ltd., Tokyo Electric Power Company, Mitsubishi Materials Corporation, Pacific Cement Co., Ltd., etc.
Industry Construction Consultant
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