Robert Nishimoto, a Japanese American from Hawaii, became a missionary in 1958 while serving in the US Air Force in Louisiana. He went to Thailand in 1961, where he continues his ministry today. Robert was one of the first Pentecostal missionaries from the US to reside and work in Thailand.

Spending his first five years in Thailand, Robert planted the first Pentecostal church in Chiengmai in 1964 with Rev. Saman Wannakiat. He also established Bangkok Fellowship Church in 1967 alongside Urban Wong.

While working in Thailand, Robert earned his BS degree in nutrition from Donsbaugh University in Huntington Beach, California in 1983.  He went on to receive his M.Th. and D.Th. from International Bible Seminary in 1986.

Robert authored the Thai Bible Concordance in 1983 and gave all rights to the Bible Society. He was President of Thailand Pentecostal Bible College for twelve years. He also authored the History of Pentecostal and Charismatic Mission in Thailand in 1996, just in time for the 50th anniversary celebration of the first Pentecostal missionary who came to Thailand in 1946. As well, Robert published the Leaders Companion Magazine.
Currently, Robert works to strengthen the local churches in Thailand, he gives counsel to pastors who are experiencing burn out and he raises educational funds for the poor Thai children to receive an education.