Atty. Diane D. Hastert
Listed in The Best Lawyers in America and Super Lawyers, Diane’s practice focuses on complex litigation and dispute resolution. Prior to joining the firm in 1978, she was an extern to the Honorable Herbert Choy, Circuit Judge, Ninth Circuit Court of Appeals.
Profile Summary
About Diane D. Hastert at a glance
Diane D. Hastert is a business, real estate, estate litigation, litigation, and adr attorney based in Honolulu, Hawaii, practicing at Damon Key Leong Kupchak Hastert ALC. Educated at University of Hawaii at Manoa (J.D., 1978). Recognitions include Best Lawyers in America — Arbitration (2026), Best Lawyers in America — Commercial Litigation (2026), and Best Lawyers in America — Litigation - Real Estate (2026). Serands clients in Honolulu, HI and the surrounding metropolitan area.
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About
Listed in The Best Lawyers in America and Super Lawyers, Diane’s practice focuses on complex litigation and dispute resolution. Prior to joining the firm in 1978, she was an extern to the Honorable Herbert Choy, Circuit Judge, Ninth Circuit Court of Appeals. Diane is involved in a number of professional and community activities, servicing on the Disciplinary Board of the Hawaii Supreme Court, as a national director of Easter Seals, Inc., as well as a director of Easter Seals Hawaii and the Easter Seals of Hawaii Foundation. An avid golfer, Diane is married to Mark H. Hastert. Their daughters, Shanna Kathleen Williams and Hallet Anne Smith, live in Naples, New York and Alexandria, Virginia, respectively.
Education- University of Hawaii, William S. Richardson School of Law (J.D. 1978)
- University of Washington (B.A. Political Science/Education 1966)
- Bar Admissions
- State of Hawaii 1978
- United States District Court for the District of Hawaii 1978
- United States Supreme Court 1979
- United States Court of Appeals for the Ninth Circuit 1979
- United States Court of Federal Claims 1979
- Adjunct Professor, William S. Richardson School of Law (Appellate Advocacy, 1989)
- Advisory Committee to the American Institute of Architects/RUDAT (1974-75)
- Aloha United Way (Director 2005-2008)
- Alternative Economic Futures for Hawaii (Commerce Task Force 1973-74)
- American Bar Association (Host Committee 1989)
- Board of Bar Examiners, Hawaii Supreme Court (1992-present)
- Civil Justice Reform Act Advisory Committee for the United States District Court for the District of Hawaii (Vice-chair)
- Citizens’ Advisory Commission to the Capitol District (1973-74)
- Committee Supporting Federal Judicial Independence (2000-present)
- Disciplinary Board of the Hawaii Supreme Court (2002-present)
- Disciplinary Board Hearing Officer (1990-2002)
- Easter Seals Hawaii (President 1993-95 & Director 1989-2002; 2004-present) (President’s Award 2004, Laulima Award 2003, Chairman’s Award 1993; Chairman’s Award 2004)
- Easter Seals Hawaii Foundation (Founding Director; President 2001-2003; Chairman 2003-2007; Director 2001-Present)
- Easter Seals, Inc.National Board of Directors, (2005 - present; National President’s Council Chair, 2007 - present)
- Federal Magistrate Merit Selection Panels (1987; 1999)
- Friends of the William S. Richardson School of Law (Director 2004 - present)
- Goodwill Industries of Hawaii, Inc. (Director 1980-91; Volunteer of the Year 1985)
- Hawaii Appellate Mediation Program (Mediator 2010 - present)
- Hawaii Defense Lawyers Association (Director, Secretary/Treasurer 1994-present)
- Hawaii Institute for Continuing Legal Education (Director, 1987-94)
- Hawaii Judicial Foresight Congress (1991)
- Hawaii State Bar Association (Secretary 1987; Director 1985-89)
- Hawaii Supreme Court Committee on Code of Judicial Conduct (1991-93)
- Hawaii Supreme Court Committee on Model Rules of Professional Conduct (1989-94)
- Hawaii Supreme Court Committee on Professionalism (1989)
- Hawaii Theatre Center (Director 1989-1994)
- Hawaii Women’s Legal Foundation (1993-present)
- Hawaiian Humane Society (Director 1995-2002)
- Junior League of Honolulu
- League of Women Voters (President 1973-75)
- Meritas Law Firms World Wide (Founding Director; Vice-Chair 1999-2002)
- Oahu Traffic Safety Council (1986-90)
- Oahu Development Conference (1980-86)
- Ninth Circuit Judicial Conference (Appointed Hawaii Delegate 1985-88; 1997-2000)
- Ninth Circuit Senior Advisory Selection Panel (Appointee 1988-92)
- Super Lawyers (2008 - present)
- The Best Lawyers in America (2000 - present)
- The Garden Club of America (2005 - present)
- The Garden Club of Honolulu (Director 2006 - present)
- United States District Court Judicial Conference (Delegate 1990-2003)
- United States District Court Local Rules Committee (Appointee 1988-95)
- United States District Court Panel for Review of Criminal Justice Act Panel Fees & Costs, Lawyer Representative for District, Panel Member (1999-2000)
- William S. Richardson School of Law Alumni Association (Director 2004 - present)
- Professional and Community Affiliations
Practice Areas Explained
Diane D. Hastert's Areas of Practice
Each practice area below reflects the types of cases Diane D. Hastert handles, with a brief overview of what that area of law covers.
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
Diane D. Hastert is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Hawaii →
Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.
Diane D. Hastert is one of 316,149 real estate attorneys indexed nationally. Browse real estate attorneys in Hawaii →
Diane D. Hastert is one of 20,023 estate litigation attorneys indexed nationally. Browse estate litigation attorneys in Hawaii →
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Diane D. Hastert is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in Hawaii →
Mediators and arbitrators for civil, commercial, family, and employment dispute resolution.
Diane D. Hastert is one of 73,906 adr attorneys indexed nationally. Browse adr attorneys in Hawaii →
Jurisdictional Context
Why local counsel matters in Hawaii
Practicing law in Hawaii. Legal matters in Hawaii are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Honolulu are typically filed in the local municipal court or the appropriate Hawaii state district court, depending on subject matter and amount in controversy. An attorney licensed in Hawaii brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Hawaii courts without local counsel or pro hac vice admission.
Looking for additional Hawaii attorneys? Browse all attorneys in Honolulu or all attorneys in Hawaii.
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