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About me

Hamasaki Law is a top rated criminal defense law firm representing individuals under investigation or facing criminal prosecution in California state and federal courts. We take on the toughest cases and achieve the best possible results for our clients.

 We handle complex cases, from state financial, narcotics and homicide matters to federal computer crimes prosecutions, giving every client and every case individual attention.

 We recognize that even minor matters can have significant consequences to our clients’ families and careers, so whether fighting a first-time DUI or facing a potential life sentence, we will exhaust every avenue to defend our clients' rights.

 If you are under investigation or charged with a crime, please call and set up a time to meet in person and discuss strategies to protect you, your famly and your career.

 Hamasaki Law represents individuals throughout Northern California including Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara and Sonoma.


Photos and videos

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Practice areas


  1. Criminal Defense: 65%
  2. DUI & DWI: 35%



Fixed (always), Retainer (always), Free consultation (30 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

21 total 

Are you an attorney? Endorse this lawyer

  • Jessica Louise Beeler

    John is passionate about defending the rights of the accused. It is exciting to see him work for justice, especially for issues involving free speech and illegal search and seizure. He is committed, organized, and takes action, both on his cases and in his numerous volunteer efforts that I have seen first hand. He is a great lawyer who truly cares for his clients as well as the community.


    Jessica Beeler Criminal defense Attorney
    Relationship: Fellow lawyer in community

  • Kaiya H Reeve

    John Hamasaki works tirelessly and meticulously on his cases. He cares deeply about his clients and is passionate about providing the best defense possible. He is a devoted advocate who has a broad range of experience in defending criminal cases.


    Kaiya Reeve Criminal defense Attorney
    Relationship: Fellow lawyer in community

Contact info

Hamasaki Law

1388 Sutter Street.
Suite 805
San Francisco, CA, 94103


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Rising StarSuperLawyers2015
Outstanding Volunteer in Public ServiceJustice & Diverstiy Center2013
Misdemeanor Trial Attorney of the MonthOffice of the Public Defender, San Francisco2009
Work experience
TitleCompany nameDuration
OwnerHamasaki Law2010 - Present
AttorneyOffice of the Public Defender, San Francisco2009 - 2009
Association namePosition nameDuration
California Attorneys for Criminal JusticeBoard of Governors2016 - Present
Bar Association of San Francisco, Barristers ClubBoard of Directors2016 - Present
Criminal Law & Government Investigations of the Barristers Club for the Bar Association of San FranciscoCo-chair2015 - Present
American Bar Association, Criminal Justice SectionMember2014 - Present
Asian American Bar AssociationBoard of Directors2014 - Present
American Constitution Society for Law and PolicyMember2013 - Present
California Attorneys for Criminal JusticeMember2010 - Present
California Public Defenders AssociationMember2010 - Present
National Association of Criminal Defense LawyersMember2010 - Present
San Francisco Bar AssociationMember2009 - Present
Legal cases
Case nameOutcome
People v. Z.L.Dismissal.
People v. M.G.Not Guilty at Jury Trial.
People v. P.C.Charged with marijuana felony, plea to infraction
See all legal cases 
Publication nameTitleDate
ATTN:Sandra Bland Was Arrested Because She Failed the “Attitude Test”2015
ATTN:A Lawyer Gave Us the Blunt Truth About Sandra Bland's Arrest2015
WiredShould Body-Cam Footage Always Go Public? It’s Complicated2015
East Bay ExpressRap's Poetic License: Revoked2015
The GuardianMeet Tiny Doo, the rapper facing life in prison for making an album2014
New York TimesDistracted Driving and the Risks of Ride-Hailing Services Like Uber2014
San Francisco ChronicleFormer Uber driver charged in girl’s crosswalk death in S.F.2014
Los Angeles TimesFormer Uber driver charged in death of 6-year-old girl2014
ReasonKiller or Artist? Why Rap is on Trial.2014
Los Angeles TimesA new California trend -- prosecuting rap2014
CNETUber driver charged with vehicular manslaughter2014
ABA JournalProsecutors are using rap music to convince jurors of gang ties2014
Portfolio Media (Law360)'Anonymous' Hackers Plead Guilty To PayPal Cyberattack2013
ABA JournalHacker's Hell: Many want to narrow the Computer Fraud and Abuse Act2013
The Daily CalifornianCharged protesters allege UCPD discrimination2012
The Daily CalifornianCharges against 2 more Occupy Cal protesters dropped2012
San Francisco Bay GuardianThreats or payback? Activist arrested after criticizing the SFPD and its tactics on television2011
New York TimesFor Suspected Hackers, a Sense of Social Protest2011
New York TimesMobilizing Help for People Accused of Hacking2011
Talking Points MemoDefending 'Anonymous': Lawyers For Alleged 'Hacktivists' Speak Out2011
ABA JournalCrime or Protest? Hacking Groups Pose Nettlesome Legal Issues2011
The Daily CalifornianProtesters Involved in Feb. 26 Riot Found Not Guilty of All Charges2010
The Daily CalifornianUC Berkeley Students' Hearing Continues With Testimony from Defendant2010
The Daily CalifornianTrial Begins for Feb. 26 Protesters2010
The Daily CalifornianNews In Brief: Trial of Protesters in Riot Begins2010
The Daily CalifornianTwo Arrested Protesters Charged, Plead Not Guilty2010
The Daily CalifornianRioters Clash with Police in Streets South of UC Berkeley2010
SF WeeklyFelony Charges Reduced to Misdemeanors for Alleged Attackers of White Separatists2010
SF WeeklyWhite Separatists' Alleged Attackers Enter Their Pleas2010
SF WeeklyFelony Charges For Two Alleged Attackers of White Separatists2010
The Daily CalifornianMajority of Arrested Freeway Activists Freed Without Bail2010
School nameMajorDegreeGraduated
University of San Francisco School of LawN/AJD - Juris Doctor2008
Speaking engagements
Conference nameTitleDate
KPFA - Up FrontYour Rights When Filming the Police2015
University of San Francisco School of LawOpening Statements & Closing Arguments2014
University of San Francisco School of LawCareers in Criminal Law2014
Internet ArchieveWe Are Legion: The Story of the Hackivists Panel Discussion2013