Hawaii forms "sibling" ties with other parts of the world when there's evidence of substantial grassroots support, potential for expanding exchanges and both sides are expected to benefit economically.
The state says relationships like these raise Hawaii's profile around the world and stimulate Hawaii's economy.
Hawaii has 15 other sister state relationships, including five with provinces in the Philippines and four with Japanese prefectures.
Two Hawaii sister states are in China. Morocco, Portugal, South Korea and Taiwan each have one Hawaii sister state.
Fukuoka prefecture in Japan was the first to become a sister state of Hawaii, in 1981.