日本の弁護士資格を取得後、日本で唯一弁護士から最高裁長官となった故藤林益三弁護士の事務所という非常に恵まれた環境で弁護士としての第一歩を踏み出し、同事務所では主として大企業を依頼者とする訴訟に従事する。
その後、ハーバード大学ロースクールで法学修士（LL.M.）を、また同時期にニューヨーク州の弁護士資格をそれぞれ取得する。さらに１年間同大学ロースクールに残り客員研究員として国際紛争法務等についての研究に従事した後、ニューヨークのミルバンク・ツィード・ハドリー＆マックロイ法律事務所において、2年間以上に亘り、主として日本企業を依頼者とする大型の国際紛争案件に従事する。
日本に帰国後、長島・大野法律事務所（現長島・大野・常松法律事務所）において、アソシエイトを経てパートナーに就任し、主として日本の企業を依頼者とする外国訴訟、国際仲裁、国際調停及び国際交渉を中心とする国際紛争案件、並びに外国及び国内の企業を依頼者とする日本の裁判所における訴訟等を中心に経験を重ねる。その間、5期10年間に亘って、同事務所のマネジメント・コミッティのメンバーに選出され、大規模法律事務所の経営に直接関与する。またそれ以前には、主として紛争解決案件に従事する弁護士によって構成される同事務所内のグループの代表パートナーを長年に亘って務めた。
主要取扱業務
企業提携関連紛争
金融及び証券関連紛争
競争法関連紛争
環境・公害関連紛争
ITシステム開発関連紛争
製造物関連紛争
労働関連紛争
知的財産関連紛争
等に幅広い経験を有するが、これらの中でも特に大型かつ複雑な企業紛争案件を得手としている。
- ハーバード大学法科大学院1990年修了（LL.M）
- 早稲田大学法学部 1983年卒業
資格
弁護士（日本）
New York州弁護士（米国）
- 日本語
- 英語
職歴
山本・高井法律事務所 (藤林法律事務所)
アソシエイト(1985-1993）
Milbank, Tweed, Hadley & McCloy
フォーリン・アソシエイト(1991-1993）
長島・大野法律事務所（2000年より長島・大野・常松法律事務所）
アソシエイト（1993-1996）
パートナー（1996-2023)
シニアカウンセル（2024）
専門分野などにおける活動
ハーバード大学法科大学院客員研究員（1990‐1991）
- Ranked by Legal 500 Asia Pacific, International firms and joint ventures, Hall of Fame, 2025
- Ranked by Chambers Asia-Pacific, Dispute Resolution: Domestic, 2025
- Ranked by Chambers Global in Dispute Resolution, 2025
- Named by Asia Business Law Journal as Japan’s Top 100 Lawyers, 2024
- Ranked by The Legal 500 Asia Pacific 2024 in Dispute resolution.
- Ranked by Chambers Asia-Pacific 2024 in Dispute Resolution
- Ranked by Who’s Who Legal: Global Practice Area Reports 2023 in Commercial Litigation
- Ranked by Who’s Who Legal: Japan 2023 in Commercial Litigation
- Ranked by asialaw 2023/24 in Dispute Resolution
- Named one of Asia Business Law Journal’s The A-List: Japan’s Top 100 Lawyers for 2023
- Ranked by Benchmark Litigation Asia-Pacific 2023 in Commercial and transactions - Litigation Star
- Selected for The Best Lawyers in Japan 2024, Arbitration and Mediation
- Selected for ALB Top 15 North Asia Litigators 2023
- Ranked by Chambers Global 2023 in Dispute Resolution
- Ranked by The Legal 500 Asia Pacific 2023 in Dispute Resolution
- Ranked by Chambers Asia-Pacific 2023 in Dispute Resolution
- Selected for Who’s Who Legal: Global Guide 2022 in Leading Practitioners - Commercial Litigation
- Selected for Who’s Who Legal: Japan in Leading Practitioners - Competition 2022
- Ranked by asialaw 2022/23 in Dispute Resolution
- Selected for Asia Business Law Journal The A-List: Japan’s Top 100 Lawyers 2022
- Selected for Benchmark Litigation Asia-Pacific: Litigation Star - Commercial and transactions 2022.
- Selected for ALB Asia Super 50 Disputes Lawyers 2022
- Ranked by The Best Lawyers in Japan 2023 The Best Lawyers: Ones to Watch in Japan 2023
- - Arbitration and Mediation, Corporate and Mergers and Acquisitions Law, Corporate Governance and Compliance Practice, Criminal Defense, Litigation
- Ranked by Chambers Global 2022 in Dispute Resolution
- Ranked by The Legal 500 Asia Pacific 2022 in Dispute Resolution
- Ranked by Chambers Asia-Pacific 2022 in Dispute Resolution
- Ranked by asialaw Profiles 2022, asialaw Leading Lawyers 2022 in Leading Lawyers - Dispute resolution.
- Selected for Who’s Who Legal: Japan 2021 Leading Practitioners in Litigation
- Named one of Asia Business Law Journal The A-List: Japan’s Top 100 Lawyers 2021
- Selected for Benchmark Litigation Asia-Pacific 2021, Litigation Star - Commercial and transactions.
- Selected for The Best Lawyers in Japan 2022 Arbitration and Mediation
- Ranked by Chambers Global 2021 in Dispute Resolution
- Ranked by The Legal 500 Asia Pacific 2021 in Dispute resolution: Hall of fame.
- Ranked by Chambers Asia-Pacific 2021 in Dispute Resolution
- Selected for Who’s Who Legal: Japan 2020 Leading Practitioners in Litigation
- Ranked by Asialaw Profiles 2021,Asialaw Leading Lawyers 2021 in Leading Lawyers - Dispute resolution
- Selected for Benchmark Litigation Asia-Pacific 2020, Dispute Resolution Star in Commercial and transactions.
- Selected for The Best Lawyers in Japan, Arbitration and Mediation 2021
- Ranked by Chambers Global 2020 in Dispute Resolution
- Ranked by Legal 500 Asia Pacific 2020 in Dispute Resolution
- Ranked by Chambers Asia-Pacific 2020 in Dispute Resolution
- Selected for Who’s Who Legal: Japan 2019 Leading Practitioners in Litigation
- Selected for Benchmark Litigation Asia-Pacific 2019, Dispute Resolution Star in Commercial and Transactions
- Named The Best Lawyers in Japan for Criminal Defense 2019
- Ranked by Chambers Global 2019 in Dispute Resolution
- Ranked by The Legal 500 Asia Pacific 2019 in Dispute Resolution
- Ranked by Chambers Asia-Pacific 2019 in Dispute Resolution
- Ranked by Who’s Who Legal: Japan 2018 in Competition
- Ranked by Benchmark Litigation Asia-Pacific 2018 in Commercial and Transactions
- Named The Best Lawyers in Japan for Criminal Defense 2019
- Ranked by Chambers Global 2018 in Dispute Resolution
- Ranked by Chambers Asia-Pacific 2018 in Dispute Resolution
- Ranked by Legal 500 Asia Pacific 2018 in Dispute Resolution
- Ranked by Who’s Who Legal: Japan 2017 in Business Crime Defense & Investigations
- Ranked by Chambers Global 2017 in Dispute Resolution
- Named The Best Lawyers in Japan 2018 in Litigation
- Ranked by Chambers Asia-Pacific in Dispute Resolution 2017
- Ranked by The Legal 500 Asia Pacific 2017 in Dispute resolution (Tier 1)
- Ranked by Chambers Global 2016 in Dispute Resolution
- Named The Best Lawyers in Japan 2017 in Litigation
- Ranked by Chambers Asia-Pacific 2016 in Dispute Resolution (Band 1)
- Ranked by Legal 500 Asia Pacific 2016 in Dispute Resolution (Tier 1)
- Named The Best Lawyers in Japan 2016 in Litigation
- Ranked by Chambers Global 2015 in Dispute Resolution (Band 2)
- Ranked by Chambers Asia-Pacific 2015 in Dispute Resolution (Band 2)
- Ranked by The Legal 500 Asia Pacific 2015 in Dispute resolution (Tier 1)
- Named The Best Lawyers in Japan (5th edition) in Litigation 2014
- Named as a Recommended Lawyer by Asialaw Profiles 2015
- Named a Local Disputes Star by Benchmark Asia-Pacific 2014(ADR/Litigation)
- Ranked by Chambers Global 2014 in Dispute Resolution (Band 1)
- Ranked by Chambers Asia-Pacific 2014 in Dispute Resolution (Band 1)
- Named as a Recommended Lawyer by The Asia Pacific Legal 500 2014
- Named as a Recommended Lawyer by Asialaw Profiles 2014
- Named a Local Disputes Star by Benchmark Asia-Pacific 2013(ADR/Litigation)
- Named The Best Lawyers 2013 in Litigation
- Ranked by Chambers Global 2013 in Dispute Resolution (Band 1)
- Ranked by Chambers Asia-Pacific 2013 in Dispute Resolution (Band 1)
- Ranked by The Asia Pacific Legal 500 2013 in Dispute resolution (Tier 1)
- Named as a Recommended Lawyer by Asialaw Profiles 2013
- Ranked by “PLC Which lawyer?” In Dispute resolution 2012
- Named The Best Lawyers 2012 in Litigation
- Ranked by Chambers Global 2012 in Dispute Resolution (Band 1)
- Ranked by Chambers Asia-Pacific 2012 in Dispute Resolution (Band 1)
- Ranked by The Asia Pacific Legal 500 2012 in Dispute resolution (Tier 1)
- Ranked by Asialaw Profiles 2012 in Laboure & Employment (Tier 2)
- Ranked by Chambers Asia 2011 in Dispute Resolution (Band 1)
- Ranked by Chambers Global 2011 in Dispute Resolution
- Ranked by The Asia Pacific Legal 500 2010/2011 in Dispute resolution (Tier 1)
- Named The Best Lawyers 2010 in Litigation
- 長島・大野・常松法律事務所―クイン・エマニュエル・アークハート・サリバン外国法事務弁護士事務所 共同開催セミナー (2015)
- Civil Procedure in Japan (Revised Second Edition), Juris Publishing (2002)
法曹としての活動
- Fellow, International Academy of Trial Lawyers
- Visiting Researcher, Harvard Law School (1990-1991)