What is "ogonkan"

or are the common names for a small sized variety of Japanese citrus, whose rind is of a characteristic "golden" bright yellow color.

The variety has been published as the species Citrus flaviculpus by Chōzaburō Tanaka in his 160-species scheme, but this is considered an effort of a " splitter," as opposed to Swingle's classification system which is generally preferred in the West.

Alternate spellings (romanizations) include "Ougonkan" or "Ogon-kan". It has also been called "Golden orange" in Kanagawa Prefecture.