Thank you for visiting Hattori and Partners’ website.

   Since the establishment of our firm in 1987, we have specialized in providing intellectual property services to meet the needs of our clients in accordance with the latest laws, precedents and operational standards.

   At present, intellectual property have been highly evaluated as a resource in business, and acquisition and utilization of such rights have become more and more important.
   Inventions brought by innovations are essential business tools for the company’s business growth.
   Acquiring invention rights allows you to protect your own business, prevent others from imitating, and maintain your business advantage in the market. You may also gain such advantage by choosing market monopoly, licensing, and patent opening.

   Also, by registering a product brand or corporate brand as a trademark, you can enhance the value, allowing the competitiveness of your business. From the perspective of design management, the creation of designs related to the aesthetic appearance of forms, such as industrial products and machines, interior and exterior of buildings, and images displayed on information and communication devices, can be registered as a design right to improve business value and prevent imitation.
   In addition, strategically acquiring intellectual property rights in Japan and foreign countries from a global perspective and utilizing these rights in response to market and competitive situations will promote your business in the international market to a greater advantage.

   We provide various intellectual property services that meet the needs of our clients, such as consultation on how to utilize intellectual property in management and business strategies, planning of medium- to long-term intellectual property strategies, research and analysis of intellectual property information, acquisition, utilization and exercise of rights related to intellectual property, consulting on intellectual property, and dispute resolution.

   We will continue to make every effort to support our clients’ intellectual property activities.


January 2024

PartnerMasaki Hattori PartnerKoichi Okada PartnerHiroyuki Inoue


Patent Attorney Corporation

Firm History


Establishment of Hattori International Patent Firm


Started business with overseas clients


Started paperless online filing


Established Hattori and Associates, Ltd.


Office relocated to current location


Firm website established


10th anniversary of the establishment of the firm


20th anniversary of the establishment of the firm


30th anniversary of the establishment of the firm


Established Hattori & Partners (Professional Patent Corporation)


Name changed to Hattori & Partners (Patent Attorney Corporation)

Managed principle

We offer our clients IP services with speed, accuracy and high quality while supporting them in obtaining intellectual property rights.


 We aim to complete work faster than our clients expect.


 We are dedicated to understanding our clients’ needs and serving them accurately and at the right time.


 We do everything possible to meet our clients’ requirements while providing more than is expected.

   Technical knowledge grained by individual staff members is freely shared among all the staff according to the idea of ‘Growth, Improvement and Learning.’ This is a prime source of valuable wisdom. This way we may provide services with added value to our clients, which allow us to achieve management based on the principle of ‘three-way benefit’.

Idea of ‘Growth, Improvement and Learning’

Grow, improve and learn together!

   We experience both success and failure as a natural part of the process of growing and improvement. We believe one must always strive to learn from the success of others and from your own mistakes.

   Our improvements benefit our clients and the greater society.

   When our clients are 100% satisfied, our recognition grows.

   Our staff knows their hard work will come back to reward them.


Management based on
the principle of ‘three-way benefit’

Who are the ‘three’?
‘Clients’, ‘Our firm’ and ‘Staff’


   We support our clients’ continuous development in the IP field. We help our clients obtain intellectual property rights while reducing infringement risks. We do this with speed, accuracy and high quality.

Our firm

   Our firm makes contributions to the society through our expert support of ‘creating intellectual property’, ‘acquiring intellectual property rights’ and exercising intellectual property rights’ in Japan and beyond.


   Our staff gains technical knowledge according to our policy of ‘Growth, Improvement and Learning’, which will then enable them to offer services with added value to our clients. As a result, staff members feel the joy of making an important contribution to society as they mature as people.