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Attorneys/Patent Attorneys

Shusaku YAMAMOTO PATENT ATTORNEY

Shusaku YAMAMOTO, is the Founder of SHUSAKU·YAMAMOTO. He founded the Firm on September 20, 1979. His practice focuses on the worldwide procurement, defense and enforcement of patents in the biotechnology, chemical, biopharmaceutical, electronics materials, life sciences, medical device & pharmaceutical industries.

Languages: Japanese & English.

Kensaku YAMAMOTO ATTORNEY-AT- LAW/PATENT ATTORNEY

Kensaku YAMAMOTO, is the Owner of SHUSAKU·YAMAMOTO. He joined the Firm in 2011. His practice includes intellectual property litigation, appellate, healthcare, energy, cleantech, environment, food & consumer regulatory, technology contracts and licensing and other commercial, corporate and regulatory matters. He also advises clients on all types of Commercial and Contract Contentious And Non-Contentious Matters, including Complex Commercial And Contract Disputes, Licensing, Merchandising and Transactional, Patent, Trademark, Design & Other Commercial/IP Litigation, Anti-Counterfeiting, Criminal IP Enforcement, Customs Seizures, Research And Technology Collaboration, Employment & Labor, General Corporate Governance & Compliance Matters, Corporate Finance, Venture Capital, Project Finance, Corporate Reorganization & Insolvency, Franchise, Special Liquidation, Business Incorporation, Ventures & Startups.

Languages: Japanese & English.

Takeshi OSHIO PATENT ATTORNEY

Takeshi OSHIO, was born in Osaka, Japan, has a Bachelor's degree in Mathematics from Tohoku University, a National University (1985). He joined the firm as a patent practitioner in 1992. Before joining the Firm as an Associate, he was an engineer at Hitachi Ltd. He is registered to practice before the Japanese Patent Office and appear as Patent Counsel before the Japanese Courts, admitted, 1995.

Languages: Japanese and English.

Practice Areas: Automotive, Aerospace, Electronics, Energy, Computer Software & Hardware, Mechanical, Medical devices, Satellite & Communication, LSI, Patent Invalidation & Litigation.

John A. TESSENSOHN FOREIGN ATTORNEY

John A. Tessensohn, was born in Singapore. Before joining the Firm in November 1994, he practiced in Singapore as a litigation lawyer handling general civil, trust, complex corporate & international IP matters.

Language: English.

Practice Areas: International Intellectual Property, Patent & Trademark Litigation, Trademarks, Patent Term Extensions, Unfair Competition, Domain Names, Designs, Utility Models, Copyright, Branding, Entertainment, Anti-counterfeiting, Anti-Piracy & Customs Enforcement, Criminal IP Enforcement, Technology Transfer, Licensing, Labeling, Advertising, Marketing, Sweepstakes, Promotions, & Premiums, Healthcare, Energy, Environment, Cleantech, Food & Consumer Regulatory, Pharmaceutical Advertising, Antitrust, Investigation, Due Diligence, Startups & Ventures, Corporate Finance, Venture Capital, Project Finance, General Corporate Governance, Compliance matters, Cross border Corporate Insolvency, Tax Advisory, Business successions, Corporate Restructuring and International Commercial Transactions & Litigation.

Natsuki MORISHITA PATENT ATTORNEY

Natsuki MORISHITA, born in Kanagawa, Japan. He has a Bachelor's degree in Chemical Science from University of Tokyo, a National University (1988). Before joining the Firm as an Associate, he was an engineer at Sekisui Chemical Industries Co., Ltd. He is registered to practice before the Japanese Patent Office and appear as Patent Counsel before the Japanese Courts, admitted, 1998.

Languages: Japanese and English.

Practice Areas: Cosmetics, Food technology, Organic and Inorganic Chemistry, Cleantech, Industrial Chemistry, Medical imaging technology including MRI, x-ray, ultrasound, etc., Polymer Chemistry, Medical Devices, Patent Term Extensions & Patent Opposition, Invalidation & Litigation.

Masahisa HASEBE PATENT ATTORNEY

Masahisa HASEBE, born in Hokkaido, Japan. He has a Master's degree in Fermentation Technology from Osaka University, a National University (1991). Before joining the firm as an associate in 1999, he was a researcher at Pharmacia Biotech Co.,Ltd. He is registered to practice before the Japanese Patent Office and appear as Patent Counsel before the Japanese Courts, admitted, 2005.

Languages: Japanese & English.

Practice Areas: Biotechnology, Cleantech, Diagnostic, Surgical, and Medical Imaging equipment & devices, Microbiology, Molecular Biology, Medical devices & Instruments, Organic Chemistry, Patent Term Extensions and Patent Opposition, Invalidation & Litigation.

Takatoshi IIDA PATENT ATTORNEY

Takatoshi IIDA, born in Yokohama, Japan. He has a Master's degree in Physics from University of Tokyo (2005) and joined the firm in 2005 after his university graduation. He is registered to practice before the Japanese Patent Office and appear as Patent Counsel before the Japanese Courts, admitted, 2012.

Languages: Japanese & English.

Practice Areas: Automotive, Aerospace, Electronics, Energy, Electrical Engineering, Mechanical, Medical devices, Semiconductor devices, Software Engineering, Transportation, Telecommunications, Patent Litigation & Invalidation.

Daisuke ISHIKAWA PATENT ATTORNEY

Daisuke ISHIKAWA, born in Shizuoka, Japan. He has a Master's degree in Biotechnology from Osaka University, a National University (2004). Before joining the firm as an associate in 2005, he working in Fuji Soken. He is registered to practice before the Japanese Patent Office and appear as Patent Counsel before the Japanese Courts, admitted, 2012.

Languages: Japanese & English.

Practice Areas: Biotechnology, Consumer Products, Cleantech, Diagnostic, Surgical, and Medical Imaging equipment & devices, Molecular Genetics, Molecular Biology and Chromosomal Engineering, Nanotechnology, Licensing, Patent Term Extensions, Reinstatement and Restoration of Patent Filings, Patent Opposition, Invalidation & Litigation & Designs.

Ryouji MIKATA PATENT ATTORNEY

Ryouji MIKATA, born in Osaka, Japan. He studied Architectural Engineering at Osaka University (2002). Before joining the firm as an associate in 2012, he worked for a judicial scrivener firm. He is registered to practice before the Japanese Patent Office and appear as Patent Counsel before the Japanese Courts, admitted, 2011.

Languages: Japanese & English.

Practice Areas: Trademarks, Designs, Unfair Competition, Anti-counterfeiting, Customs & Criminal IP Enforcement and Civil Law.

Laarni Q. VINAS FOREIGN ATTORNEY

Laarni Q. VINAS was born in Naga City. She graduated with a Juris Doctor from University of the Philippines Diliman (2011) and a Bachelor of Arts (Political Science) from Ateneo de Manila University (2004).

She is a Legal Director.

She was admitted as Solicitor of the Senior Courts of England and Wales (2018), an Attorney of Law in New York (2016) and the Philippines (2012). Before joining the Firm as a Legal Assistant in 2012, she had administrative and legal experience in intellectual property, tax, real estate and commercial matters.

Language: English

Practice Areas: Transactions and Advisory, IP clearance and analysis services, IP portfolio management, Health Regulatory, General Corporate Governance and Compliance, Licensing, Antitrust, Due Diligence, Ownership & Recordals, Procurement, Practice & Technology Management, Assignments, Ownership, Startups & Ventures, General Corporate Governance, Compliance, Corporate Finance, Venture Capital, Project Finance, Franchise & Distribution, Procurement, Cross border Corporate Insolvency, Corporate Restructuring and International Commercial Transactions & Litigation.

Masato IDAKA ATTORNEY-AT- LAW

Masato IDAKA was born in Kyoto, Japan. He graduated with a Juris Doctor from Kobe Gakuin University (2009) and a Bachelor of Commerce from Doshisha University (2005). He is registered to practice before the Supreme Court of Japan, admitted, 2013.

Languages: Japanese and English

Practice Areas: Patent, Trademark & IP Litigation, Anti-counterfeiting, Customs & Criminal IP Enforcement, Employment & Labor, Confidentiality, Privacy and Data Protection, Redundancies & Early Retirement, Unfair Competition, Antitrust, General Corporate Governance and Compliance matters, Corporate Restructuring and International Commercial Transactions & Litigation.

Seiya TOGASHI PATENT ATTORNEY

Seiya TOGASHI was born in Hokkaido, Japan. He has a Master's degree in Life Science from Hokkaido University, a National University (2014). He is registered to practice before the Japan Patent Office, admitted, 2014.

Languages: Japanese and English

Practice Areas: Biotechnology, Immunological therapies and diagnostics, recombinant DNA technologies, Microbiology, Molecular Biology, Patent Opposition and Invalidation.

Takayuki HASHIMOTO PATENT ATTORNEY

Takayuki HASHIMOTO was born in Hyogo, Japan. He has a Master's degree in Mechanical Engineering from Shinshu University, a National University (1995). Before joining the Firm in 2015, he was an examiner of Japan Patent Office. He is registered to practice before the Japan Patent Office, admitted, 2015.

Languages: Japanese and English

Practice Areas: Mechanical Engineering, Production Systems Engineering, Mechatronics and Semiconductor Engineering.

Satoshi FUKUNAGA ATTORNEY-AT- LAW/PATENT ATTORNEY

Satoshi FUKUNAGA was born in Osaka, Japan. He graduated with a Juris Doctor from Osaka University(2010) and Electoronics and Materials Physics from Osaka University(2004). Before joining the firm, he was working in JX Nippon Mining Metals Co. He is registered to practice before the Supreme Court of Japan, admitted, 2011.

Language: Japanese and English

Practice Areas: Patent,Trademark & IP Litigation,Unfair Competition, General Corporate Governance,Complianace matters.

Kazuya MISAKA ATTORNEY-AT- LAW

Kazuya MISAKA was born in Tokyo, Japan. He graduated from the University of California, Berkeley, School of Law (LL.M.) (2020). He also graduated with a Juris Doctor from Waseda University (2010) and a Bachelor of Law from Waseda University (2007). Before joining the firm, he was working in legal and IP divisions in Sumitomo Dainippon Pharma. He is registered to practice before the Supreme Court of Japan, admitted, 2011.

Languages: Japanese and English

Practice Areas: Patent, Trademark & IP Litigation, Unfair Competition, Antitrust, Regulatory (Medicine and Healthcare), General Corporate Governance and Compliance, Licensing, International Corporate Transactions, Privacy and Data Protection, Healthcare, Energy, Environment, Cleantech, Food & Consumer Regulatory Matters, Litigation and General Commercial matters.

Hiroki TANAKA PATENT ATTORNEY

Hiroki TANAKA was born in Kumamoto, Japan. He has a Master's degree in Engineering from University of Tokyo (2013) and joined the firm in 2013 after his university graduation. He is registered to practice before the Japan Patent Office, admitted, 2018.

Languages: Japanese and English

Practice Areas: Information technology, Telecommunications, Electrical engineering, Software engineering, Hardware engineering, Semiconductor engineering and Aerospace engineering.

Daisuke KAMMERA ATTORNEY-AT- LAW

Daisuke KAMMERA was born in Miyazaki, Japan. He graduated with a Juris Doctor from Kyoto University (2008) and a Bachelor of Law from Osaka University (2006). Before joining the firm, he was working at legal department of OMRON Corporation, a Japanese manufacturing company, for almost 7 years (For 5 years temporally transferred to OMRON HEALTHCARE,.Co.Ltd, ,a Japanese medical device company). He is registered to practice before the Supreme Court of Japan, admitted, 2009.

Languages: Japanese and English

Practice Areas: Patent, Trademark, Design & IP Litigation, Anti-bribery, Unfair Competition, Antitrust, Regulatory (especially Medical device and Healthcare), General Corporate Governance and Compliance, Licensing, International Corporate Transactions, Privacy and Data Protection, Litigation and General Commercial matters, Employment & Labor, Special Liquidation, M&A, Alliances and Criminal case.

Sasha LYNCH FOREIGN ATTORNEY

Sasha LYNCH was born in North Adelaide. He graduated with a Bachelor of Laws with Honors (2018) and a Bachelor of International Studies (2017) from University of Adelaide. He was admitted as an Australian Lawyer at the Supreme Court of Victoria (2019). Before joining the Firm as an International Assistant in 2019, he had legislative, administrative, family, criminal and corporate law experience.

Language: English

Practice Areas: Intellectual Property, Compliance, Transactions, Ownership and Recordals, Procurement and International Commercial Transactions & Litigation.

Hayato TAKAHASHI PATENT ATTORNEY

Hayato TAKAHASHI, born in Yamanashi, Japan. He has a Master's degree in Biotechnology from University of Tsukuba, a National University (2006). Before joining the firm in 2019, he worked for another patent firm. He is registered to practice before the Japanese Patent Office and appear as Patent Counsel before the Japanese Courts, admitted, 2014.

Languages: Japanese and English

Practice Areas: Biotechnology, Molecular Biology, Plant Physiology, Reinstatement and Restoration of Patent Filings, Patent Opposition, Invalidation and Litigation & Designs.

Tiyana PERTIWI FOREIGN ATTORNEY

Tiyana PERTIWI was born in Jakarta. She graduated with a Master of Laws from University of Southampton (2020) and Bachelor of Laws with Honors from University of Indonesia (2013). She holds an advocate’s license from PERADI (Indonesia Advocates Association) (2016).

Before joining the Firm as a Foreign Attorney in 2019, she practiced at a commercial litigation firm handling commercial litigation, corporate, insolvency and trademark matters,

Language: English

Practice Areas: Compliance, Regulatory, Transactions, Ownership, Transfers and Recordals, Licenses, Pledges, Administrative, General Corporate Governance, Procurement & Litigation.

Akito HONDA ATTORNEY-AT- LAW

Akito HONDA was born in Hyogo, Japan. He graduated with a Juris Doctor from Kyoto University (2018) and a Bachelor of Science from Kyoto University (2015). He is registered to practice before the Supreme Court of Japan, admitted, 2019.

Languages: Japanese and English

Practice Areas: Trademark & IP Litigation, Unfair Competition and General Corporate governance and Compliance, International Commercial Transactions & Litigation.

Kosuke MASUDA ATTORNEY-AT- LAW

Kosuke MASUDA was born in Kyoto, Japan. He graduated with a Juris Doctor from Kyoto University (2018) and a Bachelor of Law from Kyoto University (2016). He is registered to practice before the Supreme Court of Japan, admitted, 2019.

Languages: Japanese and English

Practice Areas: Trademark & IP Litigation, Unfair Competition, General Corporate Governance and Compliance, International Commercial Transactions & Litigation, Tax Advisory & Counseling.

JIANG Yuanmeng FOREIGN ATTORNEY

Jiang Yuanmeng was born in Chongqing. She graduated with a Juris Doctor from University of New South Wales (2018) and Bachelor of Laws from Southwest University of Political Science & Law (2015). She is admitted as a Lawyer of Supreme Court of New South Wales (2019).

Before joining the Firm as a Foreign Attorney in 2021, she had experience in corporate compliance, aviation, leasing, purchase, real estate, immigration and general corporate matters.

Language: Mandarin & English

Practice Areas: Intellectual Property Procurement & Regulatory, Transactions, Ownership, Transfers and Recordals, Licenses, General Corporate Affairs & Litigation.

Paulina M. PARUÑGAO FOREIGN ATTORNEY

Paulina M. PARUÑGAO was born in Quezon City. She graduated with a Juris Doctor (2015) and Bachelor of Science in Psychology (2011) from University of the Philippines Diliman. She was admitted as an Attorney of Law in the Philippines (2017).

Prior to joining the Firm as a Foreign Attorney in 2022, she was Legal Counsel of the legal compliance department of a leading corporate solutions provider in Southeast Asia who provided corporate governance and business advisory services to companies.

Language: English

Practice Areas: Compliance, Procurement, Designs, Technology Management, Corporate, Commercial & Trade Practice, Anti-Monopoly & Antitrust, Technology, Corporate Governance & Compliance and Dispute Resolution.

Sarah PARK FOREIGN ATTORNEY

Sarah PARK was born in Sydney. She graduated with a Juris Doctor (2020) and Bachelor of Music, Performance (2013) from University of Sydney. She was admitted as a Lawyer of the Supreme Court of New South Wales (2021).

Prior to joining the Firm as a Foreign Attorney in 2022, she had experience in corporate compliance, conveyancing and property law, food standards and regulations and general civil litigation.

Language: English

Practice Areas: Compliance, Procurement, Designs, Technology Management, Corporate, Commercial & Trade Practice, Corporate Governance & Compliance and Dispute Resolution.

Jinglu SHI PATENT ATTORNEY

Jinglu SHI was born in China. She has a Master's degree in Molecular and Chemical Life Science from TOHOKU UNIVERSITY (2009) and a Master's degree in Intellectual Property Law from University of Osaka (2016). Before joining the firm in 2022, she worked in a research and development position, and then worked as a foreign Attorney in other Japanese Patent Offices, in house and Chinese Patent Office.

Language: English, Japanese and Chinese

Practice Areas: Organic Chemistry, Total Synthesis, Polymer Chemistry, Inorganic Chemistry, Molecular Biology, Microbiology, Cell Biology, Biochemistry, Pharmaceutical Sciences, and Functional Materials.

Masahiro HASHIMOTO ATTORNEY-AT- LAW

Masahiro HASHIMOTO was born in Osaka, Japan. He graduated with a Juris Doctor from Osaka University (2021) and a Bachelor of Law from Kyoto University (2019). He is registered to practice before the Supreme Court of Japan, admitted, 2022.

Languages: Japanese and English

Practice Areas: Trademark & IP Litigation, Unfair Competition, General Corporate Governance and Compliance, International Commercial Transactions & Litigation.

Arisa IKEDA ATTORNEY-AT- LAW

Arisa IKEDA was born in Osaka, Japan. She graduated with a Juris Doctor from Kyoto University (2021) and a Bachelor of Law from Osaka University (2019). She is registered to practice before the Supreme Court of Japan, admitted, 2022.

Languages: Japanese and English

Practice Areas: Patent, Trademark, Design, Copyright & IP Litigation, Unfair Competition, General Corporate Governance and Compliance, International Commercial Transactions & Litigation, Privacy and Data Protection, Litigation and General Commercial matters, Employment & Labor.

Ada ACAMPADO FOREIGN ATTORNEY

Ada ACAMPADO was born in Quezon City. She graduated with a Juris Doctor (2021) and Bachelor of Arts, Social Sciences (2016) from Ateneo de Manila University. She was admitted as an Attorney of Law in the Philippines (2022).

Language: English

Practice Areas: Compliance, Corporate, Commercial & Trade Practice, Corporate Governance & Compliance and Dispute Resolution.

Misaki SHIGENO ATTORNEY-AT- LAW

Misaki SHIGENO was born in Yamaguchi, Japan. She graduated with a Juris Docter from Osaka University (2021) and Bachelor of Law from Doshisha University (2018). She is registered to practice before the Supreme Court of Japan, admitted, 2023.

Languages: Japanese and English

Practice Areas: Patent, Trademark & IP Litigation, Unfair Competition, General Corporate Governance and Compliance, International Commercial Transactions & Litigation, Employment & Labor.

Fumihiro SEKIYA ATTORNEY-AT- LAW

Fumihiro SEKIYA was born in Chiba, Japan. He graduated with a Juris Doctor from Keio University (2022) and a Bachelor of Law from Kyushu University (2019). He is registered to practice before the Supreme Court of Japan, admitted, 2023.

Languages: Japanese and English

Practice Areas: Patent, Trademark, Design, Copyright & IP Litigation, Unfair Competition, General Corporate Governance and Compliance, International Commercial Transactions & Litigation, Privacy and Data Protection, Litigation and General Commercial matters, Employment & Labor, and Criminal case.

Junko ASAI ATTORNEY-AT- LAW

Junko ASAI was born in Kanagawa, Japan. She graduated from the University of Pennsylvania School of Law (LL.M.) (2020) and a Juris Doctor from Keio University (2007). Before joining the Firm, she worked as a practicing lawyer with expertise in litigation, arbitration, and negotiation in Tokyo (2007-2024). She also worked as a researcher at the Ministry of Foreign Affairs of Japan, engaging in multilateral and bilateral negotiations (2022-2023). She is registered to practice before the Supreme Court of Japan, admitted in 2007.

Languages: English & Japanese

Practice Areas: Transactions and Advisory, General Corporate Governance and Compliance, Licensing, International Corporate Transactions, Commercial Transaction and Consumer Regulatory Matters, Litigation and Arbitration, Debt Collection, and International Inheritance.

Louisa NG FOREIGN ATTORNEY

Louisa NG was born in Kuala Lumpur. She graduated with a Bachelor of Laws, First Class Honors (2017) from University of East Anglia. She was admitted as an Australian Lawyer at the Supreme Court of New South Wales (2024).
She joined the Firm as a Legal Assistant in 2017 where she worked on foreign outgoing patent, trademark, design administration and compliance matters.

Language: English

Practice Areas: Trademarks, anti-counterfeiting, domain name disputes, unfair competition, licensing, transactions, ownership, IPR procurement and litigation.

Chenyu ZHENG FOREIGN PATENT ATTORNEY

Chenyu ZHENG, born in Zhengzhou, China. She has a Master of Applied Science in Biotechniology from McGill University (2015), and a Bachelor of Engineering in Biological Engineering from Henan Agricultural University (2013). She joined the firm in 2016 after her university graduation and she has been working in Nanjing Office since 2019. She is permitted to practice before Chinese Patent Office, Feb 1, 2021.
She joined the Firm as a Legal Assistant in 2017 where she worked on foreign outgoing patent, trademark, design administration and compliance matters.

Language: English and Mandarin

Practice Areas: Agribiotechnology, Biochemistry, Biotechnology, Cellular & Molecular Biology, Enzymology, Genomics, Microbiology, Proteomics, Immunology, and Oncology.

Zehui LUO FOREIGN PATENT ATTORNEY

Zehui LUO, born in Ningbo, China. She has a Master’s Degree in Electrical and Computer Engineering from Northeastern University (2017), and a Bachelor’s Degree in Electronic Information Science & Technology from Fudan University (2015). She joined the firm in 2017 after her university graduation and she has been working in Nanjing Office since 2020. She is permitted to practice before Chinese Patent Office, June 25, 2022.

Language: English and Mandarin

Practice Areas: Signal Processing, Image Processing, Computer Application Technology, AI-Related Technology, Telecommunication, Semiconductor, and Mechanical Engineering.

Muyang LIN FOREIGN PATENT ATTORNEY

Muyang LIN was born in Guangdong, China. She received her Master of Science from National University of Singapore (2016) and Bachelor of Science (Honors) Chemical Technology from Sun Yat Sen University and Hong Kong Polytechnic University (2014). She joined the firm in 2018 after her university graduation and she has been working in Nanjing Office since 2022. She is permitted to practice before the Chinese Patent Office, August 1, 2023.

Language: English and Mandarin

Practice Areas: Analytical Chemistry, Alloys, Chemical Engineering, Carbohydrate Chemistry, Coatings, Electrochemistry, Fuels & Additives, Food Chemistry, Medicinal Chemistry, Organic Chemistry, Physical Chemistry, Pharmaceutical Chemistry, and Polymer Chemistry.

Ma. Hazel Joy M. FACO FOREIGN ATTORNEY

Ma. Hazel Joy M. FACO was born in Roxas City. She graduated with a Juris Doctor from Ateneo de Manila University (2022) and Bachelor of Arts, Political Science cum laude (2017) from University of the Philippines Diliman. She was admitted as an Attorney of Law in the Philippines (2023).
Prior to joining the Firm as a Foreign Attorney in 2024, she was an associate lawyer with a Makati-based law firm handling corporate law and litigation matters.

Language: English

Practice Areas: General Corporate, Compliance, Procurement, Commercial & Trade Practice, Technology, Corporate Governance & Compliance and Dispute Resolution.

Jane Patria F. AMBROCIO FOREIGN ATTORNEY

Jane Patria F. AMBROCIO was born in Quezon City. She graduated with a Juris Doctor from San Beda College Alabang, School Of Law (2023) and Bachelor of Arts, Development Studies (Honorable Mention), from De La Salle University of Manila (2014). She was admitted as an Attorney of Law in the Philippines (2023).
She served the Firm as an International Paralegal (2015-2018) and after successfully completing her studies and passing the Philippine Bar on her first attempt, she rejoined the Firm as a Foreign Attorney in 2024. She has legal exposure to renewable energy and general civil matters.

Language: English

Practice Areas: General Corporate, Procurement, Corporate Governance & Compliance and Dispute Resolution.

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