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Nihon and Nippon both means Japan.
Nihon and Nippon are both Japanese ways of pronunciations to read Chinese letters indicate Japan.

I consider that the sound of "Japan" for Nihon derived from Chinese way of reading of Nihon. In Chinese they pronounce Zuban. In ancient world, Nihon changed to Japan on the long way to English speaking world.
Nihon and Nippon are both meaning JAPAN.
by ramunenakayama December 20, 2007
46 12
Japan in Japanese
I live in Nihon
by GOGLEH:^] June 16, 2003
76 8