A set of photos has been uncovered offering a fresh look into the life of Emperor Naruhito during his time studying in Britain in the 1980s.

Taken in 1985, the photos show the then-prince visiting a summer festival for Japan-U.K. friendship in London and smiling while taking part in a traditional Bon festival dance. The 59-year-old, who became emperor on May 1, studied at the University of Oxford from 1983 to 1985.

The photographs were developed from negatives kept by London-based journalist Setsuo Kato, 78, who was among the summer festival organizers. The images appear to capture the then-prince's enjoyment of his various encounters.