• We shall contribute to the growth of the industries and societies by protecting intellectual properties and new businesses.

  • RYUKA shall find ultimate needs of our clients and propose the solution, thereby assisting our clients to succeed.

  • Inventors have the hints for new business.
    A patent firm shall bridge the thought to the realization by protecting patents.

  • To be a valuable existence,
    we pursue our professionalism.

  • RYUKA shall contribute to the societies by fully realizing the potential of the intellectual property rights.


  • Awards
  • Patents, Trademarks and Designs
  • Firm Updates


For more information about our history, mission and branch office.


For more information about our practices.


We are committed to thoroughly understanding our client business and utilizing our expertise to provide the top-level solutions.

Contact Us

Please feel free to contact us if you have any questions or inquiries.


We offer Invitation Program for overseas associates.