For me it is very interesting that we can find the same Buddhism theme of 無我 (no-self / no-ego) even in her work, 'self-obliteration'.
She doesn't mention Buddhism ..., but I feel that the base idea is flowing under there in Japanese's collective consciousness.
'Polka dots, the trademark of “Kusama Happening”. Red, green and yellow polka dots can be the circles representing the earth, the sun, or the moon. Their shapes and what they signify do not really matter. I paint polka dots on the bodies of people, and with those polka dots, the people will self-obliterate and return to the nature of the universe.'
An excerpt from “Infinity Nets”, Kusama Yayoi Autobiography