World of CitrusMato Buntan Pummelo
Hodgson (1967) reports that Mato Buntan was said to have been taken from South China to Taiwan about 1700 and introduced to Japan much later. This is an attributed, approximate historical account; it does not establish a primary-documented route or exact event date.
Sources: [3]
UCR's CRC 3945 page records that the accession was received as budwood from Japan in 1984. The entry identifies CRC 3945 / PI 539398 / VI 454 and lists parents as unknown; this is collection receipt provenance, not the cultivar's discovery, origin, or a named-parent record.
Sources: [1]