Company profile


Message from the CEO

We design and manufacture the high-quality products based on our experiences, knowledge and expertise in international laws and regulations.
Our services have made us a trusted preferred partner for our clients around the world.
Our own medical equipment features unique technologis for measuring pain and blood flow, and we manufacture and market products utilizing those technologis and have expanded the busineses to overseas markets.
Our industrial equipments support research and development of advanced technologies in industries of electrical machinery, automobile and soldering materials, which is highly regarded by users in Japan as well as overseas.
Our mission is to realize the products that customers desire and to delight the customers around the world.

Futoshi Shirakawa


To customers

  • Quality is our top priority.
  • We provide outstanding works and services.
  • To fulfill customer expectations, we strive to maintain cooperative relationship with our partners.
  • We always carry out our work in a highly professional manner complying with applicable laws.

To local community

  • We carry out environmentally friendly corporate activities.
  • We contribute to the community by creating and maintaining employment.
  • Through our corporate activities, we nurture ourselves to be sound in mind and body.

Compnay plofile

Established November 18, 1963
President Futoshi Shirakawa
Business content Manufacturing services business:Metal cutting and Assembly
Medical device outsourcing business:OEM and ODM services for medical regulated products
SMT business:High temperature observation
Patent “High temperature observation equipment”,”Device and Method for evaluation wettability of solder paste” and many others


1963 ・Established SANYOSEIKO CO., LTD. in Otsuki City, Yamanashi
・Started precision parts processing business for optical products
1988 ・Established a development department for developing own brand products
1999 ・Developed and started sales of “SMT Scope”, a high temperature observation equipment manufactured in house
2003 ・Acquired ISO9001 certification
2008 ・Contracted to join the Strategic Core Technology Advancement Program (Ministry of Economy, Trade and Industry, ~2011).
2009 ・President Toshikazu Shirakawa receives The Order of the Rising Sun, Gold and Silver Rays in the spring conferment
2010 ・Acquired ISO14001 certification
2013 ・Formed a Business alliance with Osachi Co., Ltd.
・Full-scale entry into the medical device business
2014 ・Acquired medical device manufacturing license
・JIS Standard JIS Z3284-4 4.5 displacement detecting wettability test was issued. Released the JIS conformed “Displacement detecting wettability tester.”
2015 ・Acquired license for manufacturing and selling business of classⅡmedical device
・Acquired ISO13485
2017 ・Certified as the Companies Driving Regional Growth by METI
・Participate in the standardization of JIS Standard JIS Z3285 Solder paste for micro-joining — Characteristic test methods for solder paste using fine particles
2018 ・Completed Shimowada medical equipment factory construction and started its operation
・Awarded the “Red Dot Award: Product Design 2018”




HQ/ Metal cutting factory
Manufacturing services business

Medical device Factory
Medical device outsourcing business


R&D Center, Lab
SMT business