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Finnegan
Chiaki Kobayashi
Partner
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vCard
  • 33rd Floor, Shiroyama Trust Tower
  • 3-1, Toranomon 4-chome
  • Minato-ku, Tokyo, Japan 105-6033
+ 813 3 431 6525
chiaki.kobayashi@finnegan.com chiaki.kobayashi@finnegan.com

Chiaki Kobayashi

Partner

  • + 813 3 431 6525 + 813 3 431 6525
  • chiaki.kobayashi@finnegan.com chiaki.kobayashi@finnegan.com
  • 33rd Floor, Shiroyama Trust Tower
  • 3-1, Toranomon 4-chome
  • Minato-ku, Tokyo, Japan 105-6033
  • vCard

Chiaki Kobayashi is the managing partner of Finnegan’s Tokyo office. She practices all aspects of intellectual property (IP) law, including client counseling, prosecution, opinion preparation, due diligence investigations, litigation, and post-grant review proceedings, with a focus on the chemical, biotechnology, and pharmaceutical industries.

With her fluency in Japanese and deep cultural appreciation, Chiaki has significant experience counseling Japanese clients on strategic IP development, patent portfolio management, due diligence, patent prosecution, litigation, and pre-litigation strategies. She has extensive experience with litigation involving Japanese parties, and she routinely works with in-house counsel and vendors to smooth the process of U.S. litigation for Japanese clients. 

 

Chiaki’s litigation practice includes numerous aspects of patent disputes, including coordinating discovery; developing infringement and invalidity strategies; preparing fact and technical expert witnesses; drafting a wide range of motions and briefs; and taking and defending depositions. She has particular experience representing pharmaceutical patent holders in litigation arising under the U.S. Hatch-Waxman Act and regularly advises on enforcement strategy in high stakes matters involving Japanese parties.

 

Chiaki frequently lectures on intellectual property issues affecting Japanese companies and their global businesses. She also participates in local professional associations, such as the Licensing Executives Society of Japan (LESJ). Chiaki has been recognized by Intellectual Asset Management (IAM) for her practice in Japan and named in Best Lawyers: Ones to Watch in Japan.

 

Et Cetera

  • ABA-Bloomberg BNA Award for Excellence in the Study of Intellectual Property Law, 2014.
  • Served as notes editor for the AIPLA Quarterly Journal, 2013-2014.
  • Former judicial extern handling vaccine injury claims for Special Master Dee Lord at the Office of Special Masters, Court of Federal Claims, Summer 2012.
  • Phi Beta Kappa, 2011.
  • Sidney S. Cohen Award in Economics, 2011.
  • CRC Press Award in Chemistry, 2008.

Experience

Senju Pharmaceutical Co.; Bausch + Lomb v. Lupin Ltd.

Represented Senju and Bausch + Lomb in Hatch-Waxman patent infringement litigation concerning multiple ANDAs for generic versions of Prolensa®.  Secured a permanent injunction against generic defendants.

1:14-cv-00667, -04149; 1:15-cv-00335; 1:16-cv-01097, D.N.J., Judges Goodman, Shipp, Simandle, Williams

Bausch + Lomb v. Sandoz, Inc.

Secured a permanent injunction against generic defendants on behalf of Bausch + Lomb, Mitsubishi Tanabe, Ube, and Senju in Hatch-Waxman patent infringement litigation concerning multiple ANDAs for generic versions of opthalmic drug Bepreve®.

1:14-cv-01325, D.N.J., Judges Arpert, Hillman, Schneider, Shipp

In re Lumify

Successfully represented Bausch & Lomb and Eye Therapies in a Hatch-Waxman patent infringement litigation and parallel PTAB challenges concerning an ANDA for generic versions of over-the-counter Lumify® ocular drops. The cases settled favorably for our clients. 

3:21-cv-16766, D.N.J., Judges Kirsch, Singh
IPR2022-00146, PTAB, Judges Hulse, New, Pollock
IPR2024-00467, PTAB, Judges Flax, Pollock, Yang
IPR2022-00142, PTAB, Judges Flax, Hulse, New, Pollock

Mitsubishi Tanabe Pharma Corporation v. Shanghai Auzone Biological Technology Co., Ltd et al.

Representing Mitsubishi Tanabe Pharma in litigation matters related to Radicava ORS (edaravone) used to treat patients with amyotrophic lateral sclerosis (ALS).

2:25-cv-03326, D.N.J., Judge Cecchi
1:23-cv-00759, D. Del., Judges Burke, Connolly, Hall
1:24-cv-01423, D. Del., Judge Hall
1:24-cv-00549, D. Del., Judge Hall

Commercial Copy Innovations, Inc. v. Mimaki USA, Inc. et al.

Represented Mimaki in a patent infringement action concerning inkjet inks and methods of printing.

8:17-cv-00437, C.D. Cal., Judges Scott, Selna

Dow Pharmaceutical Sciences, Inc. v. Tolmar, Inc.

Represented Dow and Valeant in Hatch-Waxman patent infringement litigation concerning multiple ANDAs for generic versions of Acanya®.  Secured a permanent injunction against generic defendants.

2:15-cv-07971, D.N.J., Judges Bongiovanni, Chesler, Waldor

More

Insights

Workshop

LES Japan Kanto Workshop LES Japan Kanto Workshop

March 13, 2026

Tokyo

Event

Evolving U.S. Patent Strategies: AI Technological Innovation, Challenges in the Chemical and Pharmaceutical Sectors, NPE Litigation, and the Latest Trends in NPE Litigation and at the PTAB

Evolving U.S. Patent Strategies: AI Technological Innovation, Challenges in the Chemical and Pharmaceutical Sectors, NPE Litigation, and the Latest Trends in NPE Litigation and at the PTAB Evolving U.S. Patent Strategies: AI Technological Innovation, Challenges in the Chemical and Pharmaceutical Sectors, NPE Litigation, and the Latest Trends in NPE Litigation and at the PTAB

October 30, 2025

Tokyo

Seminar

2025 LES Japan US Working Group 2025 LES Japan US Working Group

August 28, 2025

Tokyo

Seminar

Evolving Patent Strategies: Recent PTAB Trends, AI Challenges, and Biotech Innovations

Evolving Patent Strategies: Recent PTAB Trends, AI Challenges, and Biotech Innovations Evolving Patent Strategies: Recent PTAB Trends, AI Challenges, and Biotech Innovations

May 22, 2025

Tokyo

Hybrid Seminar

Japan Agency for Medical Research and Development Training Japan Agency for Medical Research and Development Training

February 25, 2025

Tokyo

Webinar

Introductory Course on Reviewing English Language Contracts for Pharmaceutical Companies Introductory Course on Reviewing English Language Contracts for Pharmaceutical Companies

January 29, 2025

Webinar

More

Professional Recognition

“Chiaki Kobayashi [is] a key adviser in the chemical, biotechnology and pharmaceutical fields, with extensive experience in prosecution, post-grant proceedings and complex litigation.”

Intellectual Asset Management Patent 1000

"Chiaki Kobayashi shines at prosecution, litigation and counselling, especially when it comes to biotechnology and pharmaceuticals. Among her professional highlights is securing a permanent injunction against generics."

Intellectual Asset Management Patent 1000

“Chiaki Kobayashi [is] a key adviser in the chemical, biotechnology and pharmaceutical fields, with extensive experience in prosecution, post-grant proceedings and complex litigation.”

Intellectual Asset Management Patent 1000

"Chiaki Kobayashi shines at prosecution, litigation and counselling, especially when it comes to biotechnology and pharmaceuticals. Among her professional highlights is securing a permanent injunction against generics."

Intellectual Asset Management Patent 1000

News

Award/Ranking

Finnegan Earns Top Rankings in 2026 IAM Patent 1000 Guide; Nearly 60 Attorneys Ranked Finnegan Earns Top Rankings in 2026 IAM Patent 1000 Guide; Nearly 60 Attorneys Ranked

May 28, 2026

Intellectual Asset Management (IAM)

Award/Ranking

50 Finnegan Attorneys Ranked in the 2025 IAM Patent 1000

50 Finnegan Attorneys Ranked in the 2025 IAM Patent 1000

June 2, 2025

Intellectual Asset Management (IAM)

Award/Ranking

46 Finnegan Attorneys Ranked in 2024 IAM Patent 1000

46 Finnegan Attorneys Ranked in 2024 IAM Patent 1000

June 6, 2024

Intellectual Asset Management (IAM)

Press Release

Finnegan Receives Top Rankings from Intellectual Asset Management; 46 Attorneys Ranked Finnegan Receives Top Rankings from Intellectual Asset Management; 46 Attorneys Ranked

June 30, 2023

Intellectual Asset Management (IAM)

Professional Activities

  • Licensing Executives Society of Japan (LESJ)
Admissions and Education

Admissions

  • District of Columbia
  • California
  • Registered Foreign Attorney in Japan (Gaikokuho Jimu Bengoshi)

Education

George Washington University Law School
J.D., with honors, 2014
Brandeis University
B.S., Biochemistry, Economics, and Chemistry, magna cum laude, 2011

Languages

  • Japanese

Chiaki's Practices

Diligence, Licensing, and Opinions
Due Diligence
Global IP Enforcement, Litigation, and Trials
Branded Hatch-Waxman (ANDA) Litigation and Trials
Patent Litigation and Trials
Pretrial Strategies
Patent Office Invalidation Proceedings
PTAB Invalidation Proceedings: IPR and PGR
Prosecution and Portfolio Management
Patent Drafting and Prosecution

Chiaki's Industries

Chemicals, Industrials, and Materials
Chemical
Life Sciences
Biotechnology
Pharmaceutical

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