Reliable water access is essential not only for households and industry but also for maintaining green spaces that enhance quality of life for urban residents. Japanese underground construction specialist Sansui Kaihatsu Co., Ltd., based in Miyoshi City, Hiroshima Prefecture and serving customers across Japan, drilled a 250-meter water well in Toyota City, Aichi Prefecture to supply sprinklers for a local golf course — powered by Atlas Copco’s Y35 portable air compressor.
Based in Miyoshi City, Hiroshima Prefecture, Sansui Kaihatsu Co., Ltd. (“Sansui Kaihatsu”) specializes in underground construction and boring works, from water wells to geothermal projects. For this golf course project in Toyota City, Aichi Prefecture, the company needed to reach water deep below the surface while maintaining consistent drilling speed and efficiency. With the Y35, Sansui Kaihatsu secured the performance required to complete the well both quickly and reliably.
Credit: Atlas Copco
Atlas Copco Y35 portable air compressor drilling a water well for golf course irrigation in Toyota City, Aichi Prefecture, Japan.
Meeting tough drilling demands
Sansui Kaihatsu specializes in a wide range of boring works, including water wells, geothermal drilling, geological surveys, and foundation piling. In this case, the challenge was to drill deep into diverse ground conditions while maintaining consistent airflow and pressure — critical factors for reaching water at 250m depth.
The company had previously experienced limitations with other compressors, which slowed down drilling progress and impacted project efficiency. To overcome these issues, Sansui Kaihatsu invested in two Atlas Copco Y35 portable air compressors, chosen for their ability to deliver both high flow and pressure across different drilling applications.
“The Atlas Copco Y35 offers top-class airflow and pressure, making it extremely versatile across our boring projects. It has exceeded expectations in drilling speed and overall efficiency,” notes Kazuyoshi Ikawa, CEO of Sansui Kaihatsu.
Adapting to diverse underground projects
The Atlas Copco Y35 has already proven its value beyond golf course irrigation projects. Sansui Kaihatsu has deployed the units in applications ranging from hot spring drilling to seismograph installation and temporary piling. The ability to use the same compressor model across such diverse jobs provides flexibility, cost savings, and confidence in performance.
“With its pressure and flow range, the Y35 adapts easily to different site conditions,” explains Jaehoon Ahn, Product Marketing Specialist at Atlas Copco Korea & Japan. “That versatility makes it an excellent choice for contractors handling varied underground construction work, from water wells to geothermal projects.”
Reliability that builds trust
For Sansui Kaihatsu, one of the greatest benefits has been faster drilling progress — allowing projects to be completed more efficiently while reducing downtime on site. The portable air compressors have also delivered fuel efficiency that meets the company’s expectations, further optimizing operating costs.
“Our customers depend on long-term performance as much as day-to-day efficiency,” says Tatsuo Seko, Sales Engineer, Portable Air Division at Atlas Copco Japan. “By combining robust equipment with evolving service support, we aim to remain a trusted partner for companies like Sansui Kaihatsu across Japan.”
Driving drilling efficiency in water solutions
By introducing Atlas Copco’s Y35, Sansui Kaihatsu has strengthened its ability to deliver reliable underground construction and water projects. From deep water wells to geothermal drilling, Atlas Copco’s portable air compressor Y35’s high-pressure, high-flow performance is helping the company work faster and with greater confidence — securing dependable water sources for communities and industries alike.