Himawari ひまわり means sunflower.
In Haebaru town, there is a place called Himawari-batake ひまわり畑 (sunflower field). Right now it is just past peak bloom, but it is still very cute to see so many sunflowers in one place. In May, they are planted by school children, and then in mid July they bloom in peak. Afterwards, the soil is then used to plant kabocha.
It is free to go see, and there is no real parking, just pull off to the side of the farm road and admire them. The field is in the midst of several other farm fields.
There is a second sunflower field in Kitanakagusuku that blooms much earlier in the year, ~March. Earlier this year we had bad weather and the flowers grew much smaller. I went 2 years ago and they were really nice. Hopefully next year they turn out well again.