[2][10] Han, whose mother later became a follower of Sun Myung Moon, was born on January 6, 1943 (lunar calendar)[clarification needed].

[16] On July 19, 2008, Han along with her husband and 14 others, including several of their children and grandchildren, were slightly injured when a Sikorsky S-92 helicopter owned by the movement crashed during an emergency landing and burst into flames in Gapyeong.

"[13][21] It is believed by the members to be the beginning of a new Completed Testament Age[22] and to have fulfilled the prophesied Marriage of the Lamb in the Revelation of John.

[29] In 1984, Han spoke at a Unification Church sponsored academic conference in Washington, D.C. to a crowd of 240 which included professors from Harvard, Princeton, Stanford, University of Michigan and the Sorbonne in Paris.

Senator Orrin Hatch introduced Han to a crowd at Capitol Hill; she stated at the event that she and Moon are the first True Parents.

"[33] In 1997, Han presided with her husband over a marriage affirmation ceremony for 28,000 couples, some married and some newly engaged, in New York City.

[36] The WFWP's purpose is to encourage women to work more actively in promoting peace in their communities and greater society,[9] and it includes 143 member countries.

[12][43]George D. Chryssides predicted, in his book Exploring New Religions (2001), that Han would lead the Unification Church and preside over Blessing ceremonies after Moon's death, since she would then be "the remaining True Parent.

[2] In 2010 National Public Radio reported that Unification Church services in the United States invoked the name of Han along with Moon in their opening greetings to congregants.

[45] In that same year, Forbes reported that Han was living in South Korea with her husband while their children took more responsibility for the day-to-day leadership of the Unification Church and its affiliated organizations.

[60] In 2020 Han spoke at a UPF sponsored in-person and virtual rally for Korean unification which drew about one million attendees.

[64] Rally of Hope is a series of summits, real and virtual, that began in August 2020, when the COVID-19 pandemic made large in-person gatherings impossible.

[65][66] At each Rally of Hope, global leaders raised important topics, such as the COVID-19 pandemic, poverty, environmental pollution, religious freedom, honoring Korean War veterans, and international security.

[67] Former U.S. President Trump spoke about the security situation on the Korean Peninsula at the Rally of Hope event, a conference organized by Hak Ja Han.

[70][71][72] Hun Sen, Prime Minister of Cambodia, received the Leadership and Good Governance Award from the UPF at the 2nd Asia-Pacific Summit.

Hak Ja Han, co-founder of the UPF, hosted the 2022 World Summit, co-chaired by Cambodian Prime Minister Hun Sen and former UN Secretary-General Ban Ki-moon.

[84][85][86] The Sunhak Peace Prize was established by Hak Ja Han to honor the legacy of her late husband, Sun Myung Moon.

[87] The first Sunhak laureates in 2015 were Kiribati President Anote Tong, for his efforts to raise awareness of the importance of climate change, and Indian aquaculture researcher Modadugu Vijay Gupta.

Laureates have included Afghani educator Sakena Yaccobi[88][89] and international health care provider Gino Strada (2017);[90][91] and Somali human rights activist Waris Dirie[92][93] and Africa development leader Akinwumi Ayodeji Adesina (2019).

[94][95][96] At the 2020 World Summit in South Korea, Ban Ki-moon, former Secretary-General of the United Nations, received the first Sunhak Peace Prize Founder’s Award for leadership on environmental issues and establishing the Sustainable Development Goals.

In addition, that year, Lutheran Bishop Munib A. Younan and Senegal President Macky Sall were honored as Laureates for their work for peace and prosperity in Africa.