Complex sentence: Nippon (Hiragana: にっぽん) is a reading of kanji that refers to Japan, more formal though rarer than "Nihon" (にほん), an alternative reading.
Split into simpler sentences: Nippon (Hiragana: にっぽん) is a reading of kanji that refers to Japan. Nippon is more formal and rarer than "Nihon" (にほん), an alternative reading.