Attorney profiles

Shimako Kato


1988 Bachelor of Material Engineering, Waseda University, Science and Engineering Faculty
1988-2006 Japan Patent Office (Examiner, Appeal Examiner)
1998 Won a scholarship by the National Personnel Authority to European Patent Office and German Patent Office
2002-2005 Seconded to the Tokyo District Court (Judicial Research Official)
2006 Joined Abe, Ikubo & Katayama
Registered as Patent Attorney
2008 Qualified as patent attorney admitted to practice intellectual property infringement litigation
2014 Higher Regional Court of Düsseldorf (Training)
2018.4- Part-time lecturer at Waseda University for LL.M. in Intellectual Property Law


  • Japan Patent Attorneys Association
  • Asian Patent Attorneys Association
  • German-Japanese Association of Jurists
  • VPP (Vereinigung von Fachleuten des Gewerblichen Rechtsschutzes)

Main Areas of Practice

Shimako Kato worked for Japan Patent Office as a patent examiner and a member of board of Appeal in the field of metal processing and polymer processing. She was also engaged in the amendment of the examination standards at JPO. In the IP division at the Tokyo District Court, she provided, as a Judicial Research Official, expert advices on technicality of patent properties to judges when they make judicial decisions of patent infringement cases in the chemical field and of other intellectual property cases.

She mainly deals with patent infringement cases as patent attorney of Abe, Ikubo and Katayama, using her experience and expertise at JPO and the Tokyo District Court.


  • "Damages in patent infringement lawsuits in Germany", Patent, Special Edition No.18, 'Study on Damages – Further Study-' (December 2017)
  • "Proof of satisfaction of the numerically limited requirement in case of measuring method is at issue –Mainly in light of Maltitol crystal case-" The circle for studying intellectual property-Liber Amicorum for Pro. Tatsuki Shibuya, compiled by the committee for the Liber Amicorum, Japan Institute for Promoting Invention and Innovation (September, 2016)
  • "Inventive step- its reasonable and reliable evaluation " Practice and challenges of modern intellectual property law, Festschrift in honor of Judge Toshiaki Iimura, compiled by Ryuich Shitara et al. , Japan Institute for Promoting Invention and Innovation (July, 2015)
  • "Recent developments on claim construction and doctrine of equivalents in Germany" Patent Vol.68 No.1 (January 2015) (Co-author)
  • "Can Japan be an attractive jurisdiction for patent litigation? -Discussion based on comparison with German system-" AIPPI Vol.60 No.1 (January 2015)
  • "New Commentary on Patent Law (Shin Chukai Tokkyo-ho) Vol.1, Articles 39" Seirin Shoin(April 2011)
  • "Enforcement of Patents in the Field of Life Science" Patent Studies, No.48 (September 2009) (Co-author)
  • "Theory of Inventiveness in the Chemical Field -From a View of Foreseeability of the Effects of Inventions" Patent, Vol.61 (October 2008)
  • "Enablement Requirements for Product Inventions Defined by Parameters -Biaxial Stretched Film Made of Aliphatic Polyester Case-" AIPPI Vol.52 No.9 (September 2007)
  • "The Binding Effect of the Decision in the First Lawsuit Seeking Cancelation of the BOA Decision on the Second Decision" Theories and Practice of Intellectual Property Law Vol. 1 [Patent Act [2]] compiled by Toshiaki Makino et al. Shin-Nihon-Houki (2007) (Co-author)

Lectures and Presentations


  • "Doctrine of Patent Exhaustion in Japan" Fordham IP Conference (New York), April 5-6, 2018
  • "The latest developments on inventive step in the lawsuits and tips for the practice", for a client company, February 7, 2018


  • "Latest Developments in Inventive Step in Japan and Case Law" The European Patent Office (Munich and The Hague), June 13 and 15, 2017
  • "Latest Developments in Patent Litigation in Japan - Important Court Decisions for Exercising Patent Rights in Japan-" Discover IP Conference 2017(Seattle, Washington Palo Alto, California), February 7 and 9,2017


  • “Latest Developments in Patent litigation in Japan -with a specific focus on the doctrine of equivalents-“, German-Japanese Associates of Jurists (Munich), Jun. 28, 2016
  • “Patent Litigation in Germany –Recent Developments in Doctrine of Equivalents and German Practice from a viewpoint of Practitioner”, Intellectual High Court (Tokyo), May 27, 2016
  • “Priority System in Japan -What US applicants should know when claiming priority in Japan?-“, AIPLA Spring Meeting (Minneapolis), May 19, 2016
  • “Japanese Patent Litigation Practice and Recent Developments in IP “, Seminar organized by a Law Firm in Korea (Seoul), Mar. 4, 2016
  • "Recent Supreme Court Decisions on Product-by-Process Claim", AIPLA Mid-Winter Meeting (La Quinta), Jan. 26, 2016


  • “Tips for Preparing Patent Specifications and Written Arguments in the Field of Pharmaceuticals and Chemicals- Teachings of Court Decisions“, Client Company (Tokyo), Aug. 24, 2015
  • “Practice for Litigation Seeking Cancelation of the JPO Decisions and Recent IP High Court decisions “, Benrishi Club (Tokyo), Jun. 30, 2015
  • "Medical Use Patent in Japan-Tips for Obtaining and Enforcing Patent", Fordham IP Conference (Cambridge), Apr. 8-9, 2015
  • “Practice for Litigation Seeking Cancelation of the JPO Decisions and Recent IP High Court decisions”, Japan Intellectual Property Association (Tokyo), Feb. 6, 2015
  • "Trends Relating to Patent Infringement Litigation in Japan: Five Good Reasons to File Lawsuits in Japan", AIPLA Mid-Winter Meeting (Orlando), Jan. 27, 2015


  • “Recent Developments in Patent Infringement Lawsuits in Japan”, IIPTI-CIPTC-INPIT Joint Seminar on Intellectual Property (Seoul), Sep. 4, 2013
  • “Tips for Preparing Patent Specifications and Written Arguments - Teachings of Court Decisions“, Benrishi Club (Tokyo), Aug. 8, 2013
  • “Battles Over Standards for Finding Inventive Step -On Which Points Do the IP High Court and JPO Emphasize?-“, APAA Joint Meeting (Seoul), Aug. 3, 2013
  • “FRAND Defense Case in Japan -Comparison with Korean Case-“, CASRIP High Technology Protection Summit (Seattle), Jul. 26-27, 2013
  • “Japanese View about Subject Matter Eligibility of Gene Patents -Should the bar be raised?-“, Fordham IP Conference (New York), Apr. 4-5, 2013


  • “Case Study of Patent Infringement Lawsuits“, Japan Institute for Promoting Invention and Innovation (Tokyo), Dec. 4, 2012
  • "Has Japan become a patentee-friendly forum?", German-Japanese Associates of Jurists (Munich), Oct. 23, 2012
  • "Has Japan become a patentee-friendly forum?”, Fordham IP Conference (New York), Apr. 12-13, 2012


  • "IP Prosecution and Enforcement in Japan", German-Japanese Association of Jurists (Hamburg), May. 4, 2011
  • "Recent Developments in Inventiveness in Japan", Fordham IP Conference (New York), Apr. 28-29, 2011


  • "Die Erfinderische Tätigkeit in Japan", VPP (Rostock-Warnemünde), May 6-7, 2010
  • "Development in Description Requirement in Japan", Fordham IP Conference (New York), Apr. 8-9, 2010
  • “Overview of Patent Infringement Lawsuits “, Japan Fair Trade Commission (Tokyo), Jan. 29, 2010


  • “Recent Developments in Inventive Step “, Benrishi Club (Tokyo), Sep. 1, 2009
  • "Recent Decisions Regarding Pharmaceutical Patents in Japan", Fordham IP Conference (Cambridge), Apr. 15-16, 2009
  • "Discussion over Patentable Subject Matter in Japan", IP Academy (Singapore), Jan. 9, 2009


  • "Patent Exhaustion Doctrine in Japan; In the light of recent supreme court decision", IP Academy (Singapore) and Fordham IP Conference (New York), Mar. 26, 2008


  • "Enablement Requirement for product patents having limitation of parameter", AIPPI Japan (Tokyo), Jun. 27, 2007