COSMO KOKI CO., LTD.

Since its inception in 1959, Cosmo Koki Co., Ltd. has established itself as a leading global specialist in the field of water infrastructure. The company’s core expertise lies in "Pipework Under Pressure"—a sophisticated engineering method that allows for the maintenance, repair, and branching of pipelines without interrupting the flow of water. In an era where a stable water supply is essential for both daily life and industrial activity, our technology eliminates the need for large-scale water outages, thereby preventing social and economic disruption.

Our technical prowess is globally recognized. A landmark achievement occurred in 2005 when we successfully performed the world’s largest valve inserting work on a DN 2600mm pipe without shutting off the water supply. This feat was officially certified by Guinness World Records and remains a testament to our unparalleled engineering capabilities. For over 25 years, we have maintained the largest market share in Japan, with more than 90% of our projects originating from government and public sector clients. This creates an exceptionally stable business foundation that remains resilient against economic fluctuations.

What sets Cosmo Koki apart is our integrated business model, encompassing R&D, design, manufacturing, and on-site engineering. Our Akita Factory and the Cosmo Technical Base Center (CTBC) serve as hubs for innovation, allowing us to respond promptly to the evolving demands of the infrastructure sector. We take pride in our "Made in Japan" quality, ensuring that every product and method we develop contributes to the safety and longevity of vital lifelines.

While we are a dominant force in Japan, our vision is global. Our international journey began in 1962 with a hot-tapping project on a crude oil pipeline in Iran. Today, we are expanding our footprint across Asia and beyond, bringing sustainable water solutions to regions where infrastructure modernization is critical.

At Cosmo Koki, our employees are driven by a sense of mission: to protect the water that sustains life. We also prioritize a healthy work environment, offering a robust work-life balance with 128 annual holidays and a supportive corporate culture. As we look toward the future, we remain committed to evolving our technologies to meet the challenges of the 21st century, ensuring that safe water remains accessible to everyone, everywhere.