Formerly Principal and Owner of ONA Landscape Architects, Dennis Y. Otsuji merged his practice with Wimmer Yamada and Caughey in November 2011. As President of ONA, Inc., for 28 years, Dennis Otsuji led his firm in providing services in landscape architecture, urban design and land planning while developing a reputation for designing exceptional, award winning projects. In his new position Dennis will provide leadership in the firm and concentrate on business development and client relations.
An active member in the American Society of Landscape Architects (ASLA) since 1979, Dennis has held important positions at both the local San Diego chapter level and at the national level. Locally Dennis served as Chapter President and Chapter Trustee; nationally he was elected to National Vice President for Policy in 1991 and in 1994 he became the 46th National ASLA President. 
Dennis is active in many civic and public service activities. He is currently a member of the City of San Diego Park and Recreation Design Review Committee and a Commissioner on the City of San Diego Planning Commission. He serves on various boards including The Friends of Manzanar and the San Diego Japanese Friendship Garden. Throughout his 40+ year career in the profession Dennis has received many awards including the American Society of Landscape Architects President Medal for Unparalleled contribution to the Profession of Landscape Architecture, as well as the Distinguished Alumnus award from the College of Environmental Design at California State Polytechnic University, Pomona. 

  • Principal
  • RLA 1557
Dennis Otsuji, RLA, FASLA

Dennis Otsuji, RLA, FASLA