Hisahito's visit to Bhutan in August by Hisahito is the premiere of the future king of the world's oldest royal family.

The trip took place three months after the prince's uncle, Emperor Naruhito, 59, ascended the throne due to abdication by King Akihito. Welcoming homeowners in traditional hakama or archery in Brutan is a rare public event of Prince Hisahito.

Japan only allows men to take the throne of Chrysanthemum and the desire to change the rules of succession is often criticized by the Conservative Party, which supports the government of Prime Minister Shinzo Abe.

Hisahito is the only male member of the royal family of his generation. The 13-year-old prince will take the throne after his father, Prince Akishino, 53, the younger brother of the Emperor.

"According to the current rule of succession, Prince Hisahito will eventually shoulder the maintenance of the existence of the royal lineage," the Asahi newspaper said. "The pressure the prince was carrying on his shoulders was overwhelming."

Hisahito, born in 2006, is considered a miracle in the eyes of the conservative faction who wants to maintain the rules of succession for men only. No male member of the Japanese royal family was born in 1965. After 8 years of marriage, the Emperor's wife, Princess Masako, gave birth to Princess Aiko. That spurs moves to amend the law of succession, so that women can inherit and pass on the throne.

But the birth of Hisahito delayed that move. "The conservative faction considers it a will to be arranged," said Hidehiko Kasahara, a professor of political science at Keio University. Now experts and media are wondering whether Hisahito will be well-prepared for the future.

"It is important for the boy to realize he has been the heir to the throne when interacting with people and keeping that intention in mind from an early age," Kasahara said. "The Japanese constitution after World War II stipulates that the emperor has no political authority and considers the king a 'symbol of the State and the peace of the people'."

Hisahito is attending a high school of Ochanomizu University. The boy who was the first member of the royal family after the war did not attend Gakushuin private school.

Unlike his grandfather Akihito, Hisahito has no special mentors to help him prepare for his future throne. Shinzo Koizumi, former President of Keio University, was Akihito's mentor and he later became a role model for his son, Naruhito, according to the scholars.

"There needs to be a person who can define with him what is suitable for a king of the 21st century," said Naotaka Kimizuka, an expert on European monarchy at Kanto Gakuin University. "However, it is not clear whether Prince Akishino or the Royal Internal Affairs Agency is considering this."

In passing a special law that allowed Akihito to abdicate in 2017, the parliament also accepted a non-binding resolution, requiring the government to ensure a steady succession of succession.

One option is to allow women, including Princess Aiko and his two elder sisters, to retain their royal status after marriage and inherit or pass on the throne to their children. This is also what most Japanese people agree to in surveys.

Conservatives also want to restore the royal lineage that was stripped of status after the war. Prime Minister Abe does not seem to want to argue this thorny issue. "They want to avoid arguing for as long as possible," Mr. Kasahara said.