Prince Akishino and his eldest daughter, Princess Mako, visited a farm raising rare pigs in Bugac, southern Hungary, on Sunday during a private trip to conduct livestock research in the prince's field of interest.

They took a horse-drawn buggy tour of the farm in a national park southeast of Budapest. After seeing a shepherding exhibition, they observed a Mangalitsa pig, a breed designated by Hungary as a national treasure.

Prince Akishino, the second son of Emperor Akihito, has made research on livestock his lifework. He looked closely at the pig and asked questions about its characteristics and breeding methods.

He has long been interested in visiting Hungary, as it boasts rare pig and cow species.

On Saturday, the prince and his daughter visited a folk museum in the capital that showcases traditional clothes, household items and agricultural equipment. Princess Mako, who has been engaged in museum studies, showed interest in pottery used for keeping wine.

With the eldest granddaughter of the Emperor set to announce her engagement to Kei Komuro on Sept. 3, the visit to Hungary could be her last overseas trip with her father while she is still single.

The two are expected to return home together Wednesday.