HIBIKI (Formerly, IEIRI & Associates ) is a Yokohama* based international IP law firm with experience in protecting its clients' intellectual property in Japan.
*Yokohama is mere 25 minutes from Tokyo by train (See Access page).

HIBIKI has 27 patent attorneys and 40 staff professionals. HIBIKI has 5 patent attorneys who have working experience in US law firm, a chinese patent engineer and one patent attorney who is proficient in Chinese, which realizes high accessibility from abroad.

Large multinational companies, like Toyota, NEC, Mitsubishi Electric and Renesas Electronics as well as startup companies rely on our firm to obtain and protect their intellectual property.

Since our establishment of 2001, we have been dedicated to building long-standing client relationships that are productive, professional and collegial. As a result, HIBIKI has grown and established itself as a leading firm who handles 1000+ patent and trade mark applications in Japan and 320+ families in many countries every year.



HIBIKI provides patent prosecution services in Japan. Our patent attorneys have not only legal and technical backgrounds but also know-how to produce truly effective patents covering future competitor's products. HIBIKI can maximize our clients' benefit by obtaining truly effective patents. We cover broad technical areas.
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HIBIKI provides trademark prosecution services in Japan. Our attorneys assist in establishing trademark rights, prosecute trademark applications, and advise on the enforcement of these rights.

HIBIKI provides legal opinions, litigation and licensing services with regard to all aspects of intellectual property rights. Our patent attorneys have experience in the drafting of legal opinions, the representing of litigations, and the drafting/negotiating of licensing.