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Shiga International Patent Office

Japan

2026_IP Stars Top Tier Firm.png
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Key practice areas
Intellectual property
Trade mark
Patent
Trade mark prosecution
Trade mark prosecution - domestic firms
Trade mark - domestic firms
Firm overview
  • One of the leading patent firms in Japan
  • Staff of 8 former JPO examiners
  • 137 patent and trademark attorneys
  • 3 Japanese attorneys at law
  • 3 Chinese patent attorneys
  • 1 Chinese attorney at law
  • 1 U.S. Attorney-at-Law (California)
  • Approximately 380 technical specialists experienced in R&D and IP matters
  • 7 native English speakers with technical backgrounds
  • 35 doctorial holders
  • 26 litigation specialists who are qualified to represent parties in court in IP infringement litigation
Practice Areas & Sector Specialisations

Patent

- Prosecution

  • Prompt and accurate translation of documents including patent specifications and Office actions
  • Comprehensive analyses and proposals for responding to Office actions with a goal to obtaining the broadest and strongest rights
  • Exerting the utmost effort to avoid problems which might be caused by differences in language, legal systems, and formal requirements

- Appeals against Decisions of Rejection

  • We formulate and propose strategies to overcome Decisions of Rejection after rigorously verifying the examination status of counterpart applications.

- Post-Grant Oppositions (ex parte procedure)

  • We handle Post-Grant Oppositions by forming a team consisting of multiple patent attorneys having the appropriate technical background.

- Trials for Invalidation (inter partes procedure)

  • When a third party’s patent rights are exerted on our client, we can conduct an invalidation search to formulate strong grounds for invalidating the patent.
  • In contrast, if our client’s patent is the subject of an invalidation trial, we make every effort possible to maintain the patent by means of appropriate counterarguments.

Trademark and Design

  • Flexible services customized to our clients’ needs
  • Comprehensive approach in anticipation of the future enforcement of rights when performing searches and prosecution procedures
  • Undertaking negotiations, trials at the Japanese Patent Office, and lawsuits at the court
  • Proactive analyses and proposals regarding clients’ portfolios based on their business conditions
  • Applying for customs registrations and providing representation in customs seizure procedures

IP Legal Services

  • Comprehensive legal support and advice which match our clients’ strategies and objectives, while taking into consideration all relevant technical issues
  • High-quality and detailed opinions on patentability, validity, and infringement which meet the individual needs of our clients
  • Licensing and consulting
  • Litigation

Patent Searches

  • Uncovering Japanese documents in an attempt to invalidate competitors’ patents
  • Clearance searches prior to product launch
  • Creation of graphic patent portfolios and patent maps
Address:
GranTokyo South Tower, 1-9-2 Marunouchi, Chiyoda-ku
Tokyo
100-6620
Tel:+81-3-5288-5811 Fax:+81-3-5288-5831 / 5832 Email:Contact Us Web Address:http://www.shigapatent.com
2026 Edition
Patent prosecution - domestic firms
Tier 1
19 firms ranked
View full list

Tier 1

Nakamura & Partners
4 practice areas
View profile
Shiga International Patent Office
6 practice areas
View full profile
TMI Associates
12 practice areas
View full profile
Yuasa and Hara
8 practice areas
View full profile

Tier 2

Aoyama & Partners
6 practice areas
View profile
Fukami Patent Office
5 practice areas
View profile
Sugimura & Partners
4 practice areas
View profile

Tier 3

Abe Ikubo & Katayama
11 practice areas
View profile
Hiroe and Associates
4 practice areas
View full profile
Kyowa Patent and Law Office
4 practice areas
View full profile
Seiwa Patent & Law
8 practice areas
View profile
Soei Patent & Law Firm
6 practice areas
View full profile

Other Notable Firms

Asamura IP
6 practice areas
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ITOH Patent Attorney Corporation
3 practice areas
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Ohtsuka Patent Office
5 practice areas
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Sakai International Patent Office
5 practice areas
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Shusaku Yamamoto
8 practice areas
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Sonderhoff & Einsel Patent Office
6 practice areas
View profile
Trade mark - domestic firms
Tier 3
14 firms ranked
View full list

Tier 1

Nakamura & Partners
4 practice areas
View profile
TMI Associates
12 practice areas
View full profile

Tier 2

Anderson Mori & Tomotsune
10 practice areas
View profile
Kubota
8 practice areas
View profile
Nishimura & Asahi
11 practice areas
View profile
Sugimura & Partners
4 practice areas
View profile
Yuasa and Hara
8 practice areas
View full profile

Tier 3

Aoyama & Partners
6 practice areas
View profile
Shiga International Patent Office
6 practice areas
View full profile

Other Notable Firms

Asamura IP
6 practice areas
View profile
Hiroe and Associates
4 practice areas
View full profile
Mori Hamada
13 practice areas
View profile
Sakai International Patent Office
5 practice areas
View profile
Shusaku Yamamoto
8 practice areas
View profile
Testimonials

2026

“A professional, quality service.”

“I like the team because of its stability and trusting relationships. We know each other for a long time and reciprocally appreciate our works.”

“Quality, professional and personable.”

“Responsive, careful, slick.”

“Their advisory service is tailored to our needs and reasonably priced.”

“Their approach is thorough and proactive, and they consistently produce outstanding, top-tier results.”

“They are rigorous, responsive, and consistently deliver work of the highest quality.”

“They demonstrate great attention to detail, respond quickly, and maintain an exceptional standard in everything they deliver.”

 

Masato Iida

“Client handling: he has a combination of great legal/technical knowledge with a highly personable manner.”

“He provides good advice, is an excellent manager and is able to develop and maintain business relationships.”

Yuta Fukagawa

“Highly experienced professional who handles our patent matters with exceptional expertise.”

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