The couple exchanged rings during the Shinto ceremony, which was attended by about 30 people including family members.
“I’m very happy that many people were able to celebrate (our marriage),” the princess told reporters following the ceremony. “We want to make efforts to become a couple like my mother and father.”
The princess’ father “would have rejoiced in my marriage,” she told reporters.
It was the first marriage involving an Imperial family member since October 2014, when the princess' older sister, Noriko, 30, married Kunimaro Senge, 45, the Times reported.
Princess Ayako became Ayako Moriya after signing her marriage papers, Reuters reported.