Japan's emperor expresses concern about disaster survivors on his 66th birthday

Naruhito, Empress Masako, their daughter, Princess Aiko, and his younger brother Crown Prince Akishino's family waved from the palace balcony in an appearance to thank cheering well-wishers waving small rising-sun flags.

Later Monday, the emperor hosted a palace banquet, attended by Prime Minister Sanae Takaichi and other top officials and members of the imperial family.

The 2011 earthquake and tsunami killed nearly 20,000 people, forced hundreds of thousands from their homes and caused reactor meltdowns at the wrecked Fukushima Daiichi nuclear power plant. Most communities that were evacuated due to radiation have since reopened, but few people have returned due to the lack of jobs and sense of community.

Japan in April also marks the 10th anniversary of the Kumamoto earthquake that killed nearly 300 people.

Naruhito stressed the need to keep telling the lessons learned from past disasters to younger generations, while preparing for the next one. He pledged to stay close to the people, share their joys and sorrows and listen to the voices of those in disaster-affected areas, while praying for the absence of disasters.

He said he wants Aiko to follow in his footsteps and hand down history to the younger generations.

“We have raised Aiko hoping she will be a fine person as a human being and a royal member,” he said. “And I have a strong wish for her to continue to exert her strength and be active in international peacekeeping.”

Aiko, 24, is the only child between Naruhito and Masako and cannot become a monarch. She must leave her royal status if she marries a commoner under Japan's male-only succession rule that Takaichi supports and seeks to reinforce.