Farmers used big KITEs, with their farm's name printed on the underside, to introduce their rice to the world!
the world, as in "biggest in the world!" "fastest in the world!"
means border or boundary of property (80% the same usage as さかい （境） , but a bit more formal).
BOTH 境 and 境界 are often used in the figurative sense - like "This film pushes the envelope of good taste" or "His art blurs the boundary between painting and sculpture".
Also used in science.
the world of xxx ★★☆☆☆
Suffix meaning, 'the world of XXX', as in
政界(せいかい) (the world of politics) or. . . .
芸能界 (げいのうかい) (the world of show biz)