Final answer:
The statement about Japanese immigrants creating prosperous farms through their knowledge of irrigation in Southern California and Hawaii is true.
Step-by-step explanation:
The statement regarding Japanese immigrants setting up prosperous farms in Southern California and the Kingdom of Hawaii and their knowledge of irrigation leading to bountiful crops is true.
After the Japanese government facilitated emigration, many Japanese settled in Hawaii and on the West Coast of the United States, particularly in California.
They were heavily involved in farming and understood agricultural techniques which, along with their capacity to negotiate conditions for their immigrants, helped them establish successful agricultural practices.