buntaro’s “AIR rubber”, born from 70 years of history.
Rubber made in Japan by Fuji Koatsu Corporation, a company with over 70 years of history in business.
As a manufacturer of outsole and insole materials for Japan-made shoes, we have created “AIR rubber” from our accumulated knowledge of providing materials for over 70 years.
Softness that excels in shock absorption, strength that creates resilience, and viscosity that promotes the rubber’s compression and recovery speed.
AIR rubber, which pursues the balance between these factors, assists a right walking motion and aims to build a healthy body.
Made entirely from environmentally friendly materials, sustainability is one of many attractive features of AIR rubber.
In addition, the high durability of the rubber, which has passed Japanese standard color fastness to light testing (JIS L 0842), ensures your continued enjoyment of AIR rubber products for years to come.
SnowRain® is a material created from enviromentally friendly Japanese glass beads, ceramics, and special anti-slip materials.
The original mold engraved onto the sole maximizes drainage and grip, which are essential in preventing slippage.
The result is an outsole that prevents slippage in not only rain, but also snow.
AIR rubber is utilized by over 100 medical institutions throughout Japan for orthotic insoles.
It has been developed to cushion the feet from the impact of body weight, and to induce rebound from subsequent kicking-up to assist correct walking motion.
For all your needs
We welcome all inquiries from shoe designers, shoe-related companies, or any businesses developing new products using rubber or EVA (resin).
We are honing our skills and building our knowledge daily to be the business partner possible.