Company information


Company Profile


Business name Plus Knowledge Co., Ltd.
Representative Kinjo Shin
Establishment August 26, 2005
Capital ¥ 27.83 million
Settlement period July 31
Employee number 140 people(including some partner companies)
Main bank Ryukyus Bank, Okinawa Bank, Mizuho Bank
Head office 1-1-11 202 Hikawa Nana-shi Okinawa-ken
Phone number 098-987-4123
FAX number 098-987-4122



Office information




Aug.2005 Established plus knowledge in Naha-shi, Okinawa-ken, with capital of 3 million yen
Oct. 2010 Capital 5 million yen, transfer to Plus Knowledge, Inc.
Mar. 2011 Establish Tokyo office in Minato-ku, Tokyo-to
Nov. 2012 We will make capital 7 million yen
Apr. 2013 Establish testing center in IT Shinryo Park of Uruma-shi, Okinawa-ken
Nov. 2013 The capital is set at 13 million yen
May 2014 Establishment of Naha Development Center
Mar. 2015 Tokyo office moved to Meguro-ku, Tokyo-to
Mar. 2015 Becomes a member of the Security Association of Important Living Equipment
May 2015 Wakasa office (management department) established
May 2015 Capital increased to 24 million yen
Sep. 2015 Number of employees reaches 123 (including some partner companies)
Apr. 2016 Wakasa office (management department) relocated to Ameku Naha-shi, Okinawa-ken
May 2016 Capital increased to 27.83 million yen
Apr. 2017 Transfer the Ameku office (administrative department) to Okinawa IT Shinryo Park information communication equipment verification base facility
Oct. 2017 Moved Tokyo office to Shin-Yokohama office


Business achievement example

We are engaged in various staffing services in IT field such as embedded software, applications, mobile software, server operation, etc. We have many achievements in Tokyo Metropolitan area and Okinawa Prefecture.
Also in Okinawa IT Tsink Park, we have experience in software development and verification of embedded systems, verification and testing services for mobile devices, cloud servers, etc.

Business content
■IoT verification service operation
■Embedded software development business
■Testing services for financial services
■Application testing service of carrier service
■UX testing business of smartphone application
■Embedded software testing service
■Application testing service of smartphone peripheral equipment
■Service Operation / Verification of Cloud Server
■Test automation tool development support
■IT system staffing service (metropolitan area / Okinawa Prefecture)