Prince Hisahito on Thursday inspected the Grand Ring, a huge wooden structure that is a symbol of the ongoing World Exposition in the city of Osaka on the second day of his two-day visit to the city.

The 19-year-old son of Crown Prince Akishino and Crown Princess Kiko looked around the Grand Ring's architectural structure from underneath. He then made his way to the top of the structure, where he looked down at the entire venue.

Upon hearing that the entire expo venue sprawls across about 155 hectares, the young prince remarked, "That's larger than the premises of the Imperial Palace (in Tokyo)."