Fashion model Jun Hasegawa was born on June 5, 1986, in New Hampshire, USA. She is affiliated with LDH, the talent agency run by EXILE leader HIRO. Born to an American father and a Japanese mother, she moved to Hawaii at the age of two and grew up there. She was scouted at age 14 and began her modeling career in Japan. In 2002, she became an exclusive model for the women's magazine ViVi and also worked as a talent. Since 2010, she has been an exclusive model for the women's magazine GLAMOROUS. She married in 2011 and gave birth to her first child last December. After maternity leave, she returned to the entertainment industry, appearing on the cover of GLAMOROUS, released in May of this year. She also serves as an image model for various companies and brands, appearing in commercials and advertisements. She currently appears in advertisements and commercials for Casio's watch brand "Baby-G" and Otsuka Pharmaceutical's "Soycarat." She has also released a collaborative watch with Baby-G.

In 2011, she received the "Bvlgari Brilliant Dream Award 2011," sponsored by Bvlgari. This award is given to people who shine in the pursuit of realizing their dreams and goals, and has been held annually since 1999.