Small Business Architecture Firm Minatoishi Architects, Inc. is an award-winning architectural firm, with Secretary of Interiors (SOI) qualified Preservation Architects. We specialize in historic architecture and historic preservation. As dedicated preservationists, we are proud to integrate elements of Hawaii’s diverse history in our design. We work with private homeowners, commercial owners, and state and federal government agencies as preservation experts. Our primary work is building renovation and restoration. We also provide technical assistance by inventorying and assessing buildings at the front end of project design.

Type of work and specialization includes:

  • Historic Preservation
  • SOI Section 106 Guidance
  • Building Renovation
  • Building Restoration
  • Building Expansion
  • Technical Consultation
  • HABS reports
  • Listing buildings on the National Register of Historic Places
  • Listing building on the State Register of Historic Places
  • Building Relocation


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Minatoishi Architects is a certified Economically Disadvantaged Woman-Owned Small Business.

Culturally Intensive Design

Our Mission as a Small Business Architecture Firm

  • To work with the highest level of integrity- paying attention to detail and creating works of the highest quality.
  • Spending significant time on historical and material research and in order to fully and accurately analyze the architectural/cultural resource
  • To dedicate ourselves to projects which improve the environment of Hawaii.
  • To share our findings and historical research with professional colleagues.
  • To advocate for cultural heritage preservation, study, interpretation, and education.
  • To treat our employees, our clients, our colleagues, and our fellow citizens with Aloha.
  • To contribute to our clients’ success.


  • HART (Honolulu Authority for Rapid Transportation)
  • Kyo-ya Hotels and Resorts
  • Mantokuji Mission of Paia
  • NAVFAC (Naval Facilities Engineering Command)
  • State of Hawaii Department of Accounting & General Services
  • Hawaii State Department of Education
  • Hawaii State Department of Health
  • University of Hawaii Windward Community College
  • Waipahu Plantation Village