Mazie Keiko Hirono was born on November 3, 1947, in Fukushima Prefecture, Japan, and has spent more than four decades in elected office, most of them representing Hawaii. She is the junior United States senator from Hawaii, a Democrat first sworn in on January 3, 2013. She is the first woman elected to the Senate from Hawaii, the first Asian American woman elected to the Senate, the first senator born in Japan, and the first Buddhist to serve in the Senate, though she has described herself as non-practicing. Her current term runs through January 3, 2031, after she won reelection in 2024 against Republican Bob McDermott.
Her early life is central to the story she tells about herself. She spent her first years on her grandparents’ rice farm near Fukushima. Her mother, Laura Chie Sato, was Japanese American; her father was a Japanese veteran of the Second World War whose drinking and gambling left the family with little stability. When Hirono was nearly eight, her mother left the marriage and brought Mazie and a brother to Hawaii, crossing the Pacific in steerage on the President Cleveland. They arrived in 1955. Hirono spoke no English when she started school. Her mother worked low-wage jobs, including at a Japanese-language newspaper, to support the children. Hirono later became a naturalized U.S. citizen. She has said that her mother’s decision to leave Japan shaped her sense of what government can do for people who have few resources of their own.
She attended public schools in Honolulu and graduated from Kaimuki High School. At the University of Hawaii at Manoa she earned a bachelor’s degree in psychology in 1970. Campus protests against the Vietnam War were her political awakening. After several years working in the legislature and on campaigns, she went to Georgetown University Law Center and received her law degree in 1978. She returned to Honolulu and worked in the antitrust division of the Hawaii attorney general’s office.
In 1980 she ran for the Hawaii House of Representatives and won. She served from 1981 to 1994, eventually chairing the Consumer Protection and Commerce Committee, and focused on worker and consumer protections. In 1994 she was elected lieutenant governor, serving two terms under Governor Ben Cayetano. In that office she worked on workers’ compensation changes, early childhood education, and tourism issues tied to visa rules. In 2002 she became the Democratic nominee for governor and lost to Republican Linda Lingle. After the defeat she founded the Patsy T. Mink Political Action Committee in 2004 to support women candidates, named for the late Hawaii congresswoman who had been a mentor and friend and for whom Title IX was later renamed.
In 2006 she won the open seat in Hawaii’s Second Congressional District, the district once held by Mink. She served three terms in the House, from 2007 to 2013. There she worked on prepaid health care, Native Hawaiian education programs, early childhood education, food and energy issues, and legislation tied to tourism and jobs. When Senator Daniel Akaka retired, Hirono ran for the Senate in 2012. She won the Democratic primary over former congressman Ed Case and then defeated Lingle in the general election. She was reelected in 2018 and again in 2024.
In the Senate she sits on Armed Services, Judiciary, Energy and Natural Resources, Small Business and Entrepreneurship, and Veterans’ Affairs. On Armed Services she is the ranking member of the Subcommittee on Readiness and Management Support, which covers training, logistics, military construction, housing, contracting, and related environmental and energy programs. Hawaii’s large military presence, including Pearl Harbor and other Indo-Pacific installations, makes that assignment especially relevant to her state. She has pressed the Defense Department on the 2021 fuel contamination at the Red Hill Bulk Fuel Storage Facility that affected the drinking water at Joint Base Pearl Harbor-Hickam, and she has worked on legislation concerning Filipino World War II veterans, military clean energy, and the transition of service members to civilian life.
On the Judiciary Committee she has been a consistent Democratic voice on judicial nominations, immigration, and civil rights. She is known for sharp questioning of nominees and for opposition to candidates she regards as unqualified or hostile to reproductive rights, voting rights, or immigrant protections. Her broader legislative priorities track the issues she emphasized in state office: health care access, public education, early childhood programs, environmental protection, and policies affecting Asian American and Pacific Islander communities. She has opposed efforts to repeal or sharply cut the Affordable Care Act and has supported expanded health coverage, worker protections, and measures aimed at climate and clean energy. Critics on the right describe her as a reliable progressive vote with little interest in bipartisan compromise on social issues; supporters describe her as a blunt advocate for constituencies that have historically had less power in Washington.
She is married to Leighton Kim Oshima and lives in Honolulu. Ceramics is listed among her hobbies. In 2021 she published a memoir, Heart of Fire: An Immigrant Daughter’s Story, which recounts the departure from Japan, her mother’s low-wage work in Hawaii, and the path from law school to Congress. The book is part of a public narrative she returns to often: an immigrant daughter of a single mother who treats public office as a way to widen the opportunities she herself received through public schools and citizenship.
Since 2013 she has been the dean of Hawaii’s congressional delegation, serving alongside senior senator Brian Schatz. Her office maintains a weekly “Talk Story” practice for Hawaii visitors in Washington and participates in events that showcase Hawaii businesses. Those habits reflect a political style shaped by state legislative work more than by national media. She is not usually treated as a presidential prospect or a party leader in the Senate, but she has a durable base in Hawaii and a record of winning statewide races after the 2002 loss.
At nearly eighty, she remains an active member of the minority on the committees that matter most to her state: defense readiness in the Pacific, veterans’ care, energy and land issues, small business, and the federal courts. Her career is unusual in its length and in the sequence of firsts attached to it, but the through-line she emphasizes is simpler. She arrived in Hawaii as a child who did not speak English, watched her mother work multiple jobs, and built a political life around consumer protection, education, health care, and the interests of a state whose economy and security are tied to the Pacific. Whether that record is judged as effective advocacy or as conventional Democratic partisanship depends on the observer. The biographical facts are less disputed: Japanese birth, Hawaiian upbringing, law degree, fourteen years in the state House, eight years as lieutenant governor, six years in the U.S. House, and continuous service in the Senate since 2013.