Kenji Kawashima, Ph.D.

Kotaro Tadano, Ph.D.

Daisuke Haraguchi, Ph.D.

Junichi Sakata, Ph.D.

Message from the Founder

We started research and development (R&D) of surgical robot in 2003. The surgical robots have been actively studied since the 1990s and some robots have already been in practical use at the time. It is difficult for us to start cutting-edge research on the robots. However, a surgeon at Tokyo Medical and Dental University, who had been attending our research meeting, said that although the performance of the commercialized robot is admirably, the operation of the robot relied totally on visual information and haptic perception is missing.
We felt that haptic feedback is necessary to improve the safety of the surgical robots.

Our specialty is research on fluid measurement and control. We have worked on the developments of pneumatically-driven systems. Pneumatic drives are often thought to be not suitable for precise control applications. However, we have knowledges and technologies to overcome the problem. Pneumatically-driven systems have many advantages such as soft, back-drivable, suitable for small and lightweight robots. Most of the commercialized robots at the time were driven by electronic motors. We considered that the use of a pneumatic actuation to the surgical robot could provide haptics using the back-drivability of the actuator. Recently, R&D of soft robots is active because they are suitable for cooperative work with humans.
Therefore, we believe that our control technology of the pneumatic drive systems becomes more important.

My belief in robot design and control is that simple is best. I also keep in mind that continuity is the father of success. I have worked on the development of the pneumatically-driven surgical robot with Dr. Kotaro Tadano (co-founder, CTO), Dr. Daisuke Haraguchi (co-founder, Director) and the staff and students in my lab.
In 2012, we applied to the program for Creating Start-ups from Advanced Research and Technology (START program) supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) Japan.
It was our big turning point to be accepted to the program. With the support of the START program, we established RIVERFIELD Inc. in 2014.

Recently, our country Japan is facing a super-aged society, a rise of social security cost and a lack of surgeons. Medical devices and systems that improve QOL and assist surgeons are becoming more important. While always keeping in mind our dreams and goals as a university-based startup company, we will contribute to our society by the development of the surgical robot having a sense of speed.

We appreciate your continued support.

Kenji Kawashima

Kenji Kawashima
Professor, Tokyo Medical and Dental University Institute of Biomaterials and Bioengineering

Yotsuya Medical Bldg. 5th floor, 20 Samon-cho, Shinjuku-ku, Tokyo 160-0017
Tel. 03-5332-8250 Fax: 03-5332-8251