Topic summary
Jipangu

Extracted from the Wikipedia article Names of Japan.
Jipangu
As mentioned above, the English word Japan has a circuitous derivation; but linguists believe it derives in part from the Portuguese recording of the Early Mandarin Chinese or Wu Chinese word for Japan: Cipan (日本), which is rendered in pinyin as Rìběn (IPA: ʐʅ˥˩pən˨˩˦), and literally translates to "sun origin". Guó (IPA: kuo˨˦) is Chinese for "realm" or "kingdom", so it could alternatively be rendered as Cipan-guo. The word was likely introduced to Portuguese through the Malay: Jipan.