Princess Mako of Akishino, granddaughter of Japan Emperor Akihito, to become engaged to a man who also went to Tokyo's International Christian University, an Imperial Household Agency source said on May 16, 2017.

Japan's Princess Mako pictured in December 2015, a granddaughter of Emperor Akihito. The 25-year-old Princess, the elder daughter of Prince Akishino, will soon become engaged to a man who also went to Tokyo's International Christian University, an Imperial Household Agency source said on May 16, 2017.

Japan's Princess Mako, a granddaughter of Emperor Akihito, posing at Tokyo's International Christian University ahead of a commencement ceremony in March 2014. The 25-year-old Princess will soon become engaged to a man who also went to the university, the Imperial Household Agency said on May 16, 2017.

Japan's Princess Mako after meeting with her grandparents, Emperor Akihito and Empress Michiko, at Tokyo's Imperial Palace on the occasion of her coming of age in October 2011. The 25-year-old Princess will soon become engaged to a man who also went to Tokyo's International Christian University, the Imperial Household Agency said on May 16, 2017.

Japan's Princess Mako, a granddaughter of Emperor Akihito, delivering a speech with sign language at a sign language speech contest among high school students in Tokyo in August 2016. The 25-year-old Princess will soon become engaged to a man who also went to Tokyo's International Christian University, the Imperial Household Agency said on May 16, 2017.

A street TV in Tokyo's Yurakucho area shows a news report saying that Princess Mako (L), the first grandchild of Japanese Emperor Akihito, will soon become engaged to Kei Komuro (R), a 25-year-old graduate student at Tokyo's Hitotsubashi University, on May 16, 2017.

Japan's Princess Mako (R), a granddaughter of Emperor Akihito, meeting children who lost their parents in the March 2011 earthquake and tsunami disaster, along with her father Prince Akishino (L) in Sendai, northeastern Japan in March 2014. The 25-year-old Princess will soon become engaged to a man who also went to Tokyo's International Christian University, the Imperial Household Agency said on May 16, 2017.

Japan's Princess Mako strolling while pulling the reins on a horse on a ranch near Vienna where she was staying on a home-stay program in August 2006. The 25-year-old Princess will soon become engaged to a man who also went to Tokyo's International Christian University, the Imperial Household Agency said on May 16, 2017.

Prince Akishino (L) and his wife Princess Kiko looking at their newborn daughter Princess Mako at the Imperial Household Hospital in Tokyo in November 1991. The 25-year-old Princess will soon become engaged to a man who also went to Tokyo's International Christian University, the Imperial Household Agency said on May 16, 2017.

A 9-month-old Princess Mako being held by her mother Princess Kiko in Karuizawa, Nagano Prefecture in August 1992. The 25-year-old Princess will soon become engaged to a man who also went to Tokyo's International Christian University, the Imperial Household Agency said on May 16, 2017.

Princess Mako (C) heading to an entrance ceremony for the Gakushuin Primary School in Tokyo with her parents, Prince Akishino (L) and Princess Kiko in April 1998. The 25-year-old Princess will soon become engaged to a man who also went to Tokyo's International Christian University, the Imperial Household Agency said on May 16, 2017.

Princess Mako, the first grandchild of Japanese Emperor Akihito and the elder daughter of Prince Akishino, attends the annual New Year Poetry Reading Ceremony at the Imperial Palace in Tokyo on January 13, 2017. The 25-year-old Princess is set to become engaged to a man who was in the same class year as her at Tokyo's International Christian University.

Kei Komuro, who will soon become engaged to Princess Mako, a granddaughter of Emperor Akihito, leaves his home in Yokohama on the morning of May 17, 2017. Komuro is a graduate student at Tokyo's Hitotsubashi University and an employee of a legal firm in the capital.

Kei Komuro, who will soon become engaged to Princess Mako, the first grandchild of Emperor Akihito, speaks to reporters in Tokyo on May 17, 2017. Komuro, a former fellow student with the Princess at International Christian University, works at a Tokyo law firm while attending Hitotsubashi University's graduate school.

Japanese Princess Mako leaves her residence in Tokyo on May 17, 2017. The Imperial Household Agency said the first grandchild of Emperor Akihito will soon become engaged to Kei Komuro, told reporters the same day he will speak about the engagement when 'the time comes.'

Kei Komuro, who will soon become engaged to Princess Mako, the first grandchild of Emperor Akihito, speaks to reporters in Tokyo on May 17, 2017. Komuro, a former fellow student with the Princess at International Christian University, works at a Tokyo law firm while attending Hitotsubashi University's graduate school.