Natsumi Horiguchi, known in Japanese as 堀口奈津美 and ほりぐち なつみ, is a Japanese former adult film actress from Tokyo. Born on June 4, 1980, she became known in the Japanese entertainment scene after making her adult industry debut in 2007. She is also associated with the nicknames なっちゅ☆ and なっつ.
Before entering the adult entertainment industry, Horiguchi had a varied working background that included experience as an assistant director, event host, race queen, gravure model, and office worker through a staffing company. This broad early career gave her public profile a more layered image than that of a performer who entered the industry directly.
Her career as Natsumi Horiguchi continued until her official retirement in 2012. After stepping away from performing, she was involved in other business activities, including the operation of a bar called Top Field in 2013. In 2014, she returned under the stage name Nanami Hirose (広瀬奈々美) and joined ティーパワーズ, marking a new phase in her public career.
Horiguchi has also used or been linked with the names 恩田ほのか and 広瀬奈々美, which are important for readers searching across different stages of her career. Outside of her professional work, her listed interests include reading and gaming. She also studied classical ballet from childhood, although she did not pursue it as a professional dance career.
She is the eldest of three siblings, and she has previously clarified that she is not related to fellow performer Sho Nishino, despite past rumors suggesting they were sisters.
Her career is often remembered for its intensity, including reports that she once filmed 18 works in a single month and was later hospitalized with acute gastroenteritis due to overwork. While she is no longer mainly defined by her original stage name alone, Natsumi Horiguchi remains a recognizable name for audiences looking back at Japanese adult entertainment figures of the late 2000s and early 2010s.
