International Archaeological Research Institute, Inc. (IARII) provides research and historic preservation compliance services. We have served federal and state government agencies,  along with private businesses and individuals, throughout the Pacific region since 1986.  Our main office is in Honolulu, and a branch office in Guam serves the islands of Micronesia.


IARII is a research institution whose staff members devote their full attention to the concerns and issues of historic preservation. Throughout many years of operation we have effectively served public and private sector clients in their historic preservation needs. The scientific contributions of IARII’s staff are widely recognized. Senior staff members have extensive experience conducting archaeological and palaeoecological research in the Pacific Islands. Our knowledge of history, customs, traditions, and cultural practices derives not only from formal research, but also from relationships with people and organizations in the community.  We are committed to serving our community, and one of the main aims of our work is stewardship of cultural resources – ensuring they will be available for future generations.


IARII offers a variety of research and investigative services designed to meet federal, state, and local government historic preservation requirements. Various services related to public education and outreach are also offered.

Read more about our services
  • Paleoenvironmental investigations (wetland and lake cores)
  • Wood species identification
  • Osteological studies
  • Interpretive planning for archaeological sites, trails, exhibits, and museums
  • Public education programs
  • GIS design and studies
  • Photogrammetry and drone photography
  • Archaeological assessments, surveys, data recovery, and other cultural resources management services

Where We Work

IARII staff regularly conduct projects, both compliance related and grant-funded independent research, throughout the Pacific and Pacific Rim region.

  • Hawai‘i
  • Micronesia (Guam, Palau, Saipan, Tinian, Rota, Yap, Pagan, Sarigan, Kosrae, Pohnpei, Marshall Islands)
  • Sāmoa, New Caledonia, and the South Pacific
  • Korea and Japan (Okinawa and Kyushu)
  • Southeast Asia (Thailand, Cambodia, and Malaysia)
  • Northwest (U.S. and Canada)
  • South America (north Andes and the upper Amazon)