Protecting the world's infrastructure with rope access technology
Protecting the world's infrastructure with rope access technology
Keystone Co., Ltd.
Keystone Co., Ltd. is Japan’s leading rope access specialist company, founded in 1991 by Toyoharu Nakatani, who left his corporate career to start the business.
We excel in inspections, surveys, and construction work in high or hard-to-reach areas, offering safe, fast, and reliable solutions to aging infrastructure problems across Japan.
Recognized as a truly exceptional presence in the rope access industry, we pride ourselves on our unmatched technical capabilities and expertise. We have maintained a perfect safety record with zero accidents for over 35 years since our founding.
Our team consists entirely of full-time, certified technicians based in Kyoto and operating nationwide.
Clients consistently praise our work as “skilled, fast, and cost-effective,” with many expressing deep satisfaction and admiration for the results we deliver.
No matter how difficult the site may be, we propose the best solutions with flexible thinking and reliable skills.
If you feel a task might be “impossible,” please consult us first.
We provide proposals that align with your budget.
Together, we find ways to reduce costs without compromising on quality.
We aim not only for successful execution, but for results that truly satisfy our clients.
Hearing our customers say, “I’m glad I chose you,” is our greatest reward.
TEL
075-959-9095
FAX
075-959-9096
keystone@rope-access.co.jp
Keystone Gojō
Large-scale training tower, training and accommodation facility
4-2-57 Imai, Gojō City, Nara 637-0004, Japan
3-27-25 Hakataekimae, Hakata-ku,
Fukuoka City, Fukuoka 812-0011, Japan
TEL: +81-92-686-8022
PCP Marunouchi, 1-11-1 Marunouchi,
Chiyoda-ku, Tokyo 100-6213, Japan
TEL: +81-3-6775-3643
4-1-7 Kita 4-jo Nishi, Chuo-ku,
Sapporo City, Hokkaido 060-0004, Japan
TEL: +81-11-804-8641
Licensed by Kyoto Governor
(Special-6) No. 44402
Fields: Civil Engineering / Scaffolding & Earthwork / Pavement / Painting / Steel Structures / Dredging / Waterworks / Masonry
Keystone Gojō
Keystone Holdings Co., Ltd.
6-1 Kotobukisaki, Kanegahara, Nagaokakyo City, Kyoto 617-0856
6-1 Kotobukisaki, Kanegahara, Nagaokakyo City, Kyoto 617-0856
Keystone Kyushu Co., Ltd.
6-1 Kotobukisaki, Kanegahara, Nagaokakyo City, Kyoto617-0856
6-1 Kotobukisaki, Kanegahara, Nagaokakyo City, Kyoto 617-0856
4-2-57 Imai, Gojo City, Nara
637-0004
Born in Nara (Dec. 1956) / Resident of NaraStudied geology at Osaka City University (PhD program, withdrawn).Worked in in-house consulting at Tobishima Corporation’s Technology Research Institute on tunnels, dams, and land development.After leaving the corporate world, founded Keystone Co., Ltd. and began rope access inspection services.
Tomokiyo
Jodai
Graduate of Kobe International University.Powerhouse athlete with extraordinary strength who defies rope access norms.Expert in rope rescue. Former firefighter, fitness enthusiast, loves hamsters, rabbits, and sweets.Licensed in large vehicles, aerial work, special radio, hazardous materials, emergency care.Certified Road Bridge Inspector, Rope Access Technician [SORAT] Level 5 [PRO]
Tanaka
Graduate of Bukkyo University (Science & Engineering). From Uji, Kyoto.Nature guide and instructor, gymnastics background.Rope Access Technician [SORAT] Level 4 [PRO]
Kiribayashi
From Kanagawa, lovely mom, sometimes cute.Piano tuner & wall climber, trains fingers, eats weeds, mountain girl with strong legs, vegetable sommelier.Rope Access Technician [SORAT] Level 4 [PRO]
From Mineyama High School, Kyotango City, Kyoto. Former Formula race car driver.
Born in 1988 in the Kingdom of Thailand. Graduated in civil engineering from Chiang Mai University. Completed graduate studies in civil engineering at University of Technology Sydney (Australia). IRATA Level 2. Experienced in rope access work in Thailand, Cambodia, Australia, etc. Fluent in Japanese and English. Loving husband. Big anime fan. “Pich is on the move!”
Graduate of Fukuoka University of Education, with junior and senior high school teaching licenses (Health and PE). Born in Tanzania, Bolivia, and Shizuoka. Licensed Second-Class Electrician. Speaks English, Spanish, and Japanese. Enjoys mountain climbing and basketball. Likes peaceful places and nature. “If there’s something I want to do, I’ll try it!” Dislikes crowds and the black part at the end of turban shells. Born in 1988, single, lives in company dormitory.
Q: What is the origin of the name “Keystone”?
A: It is derived from the Japanese word “Kaname-ishi” (keystone), which is said to hold back earthquakes. It reflects our desire to be a reliable presence.
Q: Isn’t this a dangerous job? Is insurance in place?
A: Yes, we have full insurance coverage just like any other profession. Additionally, we have maintained a zero-accident record for 33 years since our founding.
Q: Do you have your own rope technology?
A: Yes. Based on caving techniques, we have developed original methods tailored to the needs of Japanese industries.
Q: Do you have rival companies?
A: Not directly. While some companies have partially adopted our techniques, we are often referred to as “in a league of our own.”
Q: Are your staff rock climbers?
A: No, most of them come from ordinary backgrounds. All our members are certified and experienced as professional technicians.
Open year-round, 24-hour reception
Rope Access Survey Specialists
Keystone Corporation
6-1 Kotobukisaki, Kanagahara Nagaokakyo City, Kyoto Prefecture 617-0856
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