"Kéisén" means
an "inexhaustible spring"
 in Japanese
as we hope to
 become a wellspring
 of legal solutions
 for all matters relating
 to Japanese intellectual property law.
 

Kéisén Associates, formerly Omori & Yaguchi, is a Tokyo-based Japanese intellectual property law firm with offices in Tokyo, Osaka and Philadelphia, Pa. Our practice offers a broad range of Japanese and international legal support in patent, design, and trademark law. We offer prior art search, in-house technical translations, international licensing, as well as legal consultation for international business development and technology transfer support in Japan.

Our highly skilled attorneys and patent agents are supported by a team of technical advisors, translators and an administrative staff who are fluent in English. We can provide clients with a seamless, efficient, and cost effective service in all areas intellectual property protection in Japan.

No matter how highly developed means of communication have become, there still exists the hurdles of time, language and cultural barriers which get in the way of a smooth patent and trademark prosecution in Japan. The typical complaints we hear from clients are the inability to communicate directly with Japanese legal counsel, the difficulty in evaluating quality of work of the Japanese associates, inconsistencies in the quality of translations, slow response time, and the high cost of communication, among others.

In view of this situation, Kéisén's previous incarnation, Omori & Yaguchi, founded Omori & Yaguchi U.S.A. in Philadelphia in 2000, which gives us several strategic advantages.

Our Philadelphia office has registered Japanese patent attorneys, U.S. patent attorneys, as well as U.S. patent agents. By being in the same time zone as our East coast clients, we are able to meet regularly to discuss clients' inventions and IP strategies that is so crucial in the process of creating a high level of specifications. In addition, our lawyers have intricate knowledge of the Japanese IP business, and can assist in person with legal aspects of developing markets in Japan, including licensing, franchising, and other matters related to intellectual property rights.

Our Tokyo and Philadelphia offices work cooperatively, and often simultaneously,  for an around-the-clock prosecution and litigation service for our clients. In order to facilitate better communication between our two companies, we not only conduct regular television conferences,  but frequently fly our staff to and from Japan. 

• Tokyo
  Tokyo serves as Keisen Associates' main office. In May 2006, we moved to our new location in the Chida-ward, a stone's throw from the Imperial Palace, the British Embassy, and  several government institutions, such as the Diet. Its location provides several strategic benefits as well. The office is a short distance to the Supreme Court and the Tokyo High Court, where all of the district court patent litigation cases are heard. It is also close to the Japan Patent Office enabling our lawyers to have frequent exchanges with JPO officials at every stage of patent and trademark prosecution. The Tokyo office is involved in all aspects of IP prosecution and litigation in Japan.
  
  

• Osaka
  Osaka is a commercial and industrial center of Japan defined as the second-largest economic center in the country. It alone produces approximately 2% of the world's GNP, and some thirty out of the top 500 corporations in the world are based here. Our Osaka office is a block from the district court in the heart of the commercial center of the city. The office is involved in the litigation portion of our service.

• Philadelphia, Pennsylvania
  Our U.S. office is in historical Philadelphia - the fifth largest city in the United States. Our location brings us close to many of our clients in the pharmaceutical and biomedical industries and allows us to tap into the wealth of resources offered by the university and research institutions in the area. The office's mission is to provide a "one-stop" filing service for all our non-Japanese clients' prosecution and litigation needs in Japan.