The Japanese letters prove the earth is a sphere

I am recently seeing people tell opinions that they tell the earth is flat from time to time.
But I am sorry for them, "earth" in Japanese Kanjis is written in "earth" + "ball."
地(earth) + 球(ball) = 地球 (The Earth).
At this point, it was proven that the Earth is a sphere.

Also, we have 12 hour time differences with Brazil and Uruguay where are on the opposite side of Japan. At this point, I back the theory that the Earth is a sphere due to this.

By the way, I have never doubt that paper maps are flat.