Masayo Hosono is a Japanese voice actress born on January 5, 1978, in Toyama Prefecture, Japan. She began her career in the year 2000 after graduating from the 16th term of the Katsuta Voice Actor's Academy. She entered the training school for the agency Mausu Promotion in 2000 and officially joined the agency in 2002, where she remains affiliated. Her interest and skills include photography and driving.

Hosono has built a career spanning television animation, original video animation, video games, and foreign language dubbing. One of her notable roles is Debby Kroffat in the 2005 television anime series Fighting Beauty Wulong. She is perhaps best known for her long-running role as Ayame, the waitress at the Ichiraku Ramen shop, in the globally popular Naruto franchise. She first voiced the character in the original Naruto series in 2002 and continued in Naruto: Shippuden and Boruto: Naruto Next Generations. Her work in the franchise also extended to related video games such as the Naruto: Ultimate Ninja series.

Throughout her career, Hosono has taken on a wide variety of supporting roles in numerous anime series. In the early 2000s, she appeared in series such as Geisters, Banner of the Stars II, and Scrapped Princess. Other television animation credits include roles in Gakuen Alice, Saiyuki Reload, Yakitate!! Japan, Gallery Fake, and.hack//Roots. She also provided voices for the 2012 series Listen to Me, Girls. I Am Your Father! and the 2018 series Dragon Pilot: Hisone and Masotan, in which she voiced the protagonist's mother. Her film work includes a role in the 2004 film Naruto the Movie: Ninja Clash in the Land of Snow.

In addition to anime, Hosono has an extensive body of work in video games and dubbing for foreign films and television series. Her video game credits include Full House Kiss, killer7, Kingdom Hearts II, and the 2008 visual novel 12RIVEN -the Ψcliminal of integral-. As a voice actor for dubbing, she has provided the Japanese-language voices for characters in films such as Burlesque, A Good Year, and The House Bunny, as well as for Zack Martin in The Suite Life Movie. Her work in animation dubbing includes the role of Baby Lola Bunny in Baby Looney Tunes and various characters in The Grim Adventures of Billy & Mandy.

While she often plays side characters, her consistent work across major franchises like Naruto and her long-standing affiliation with Mausu Promotion highlight her as a established and reliable presence in the voice acting industry. Her ability to perform in a wide range of media, from major anime series to video games and dubbed foreign content, demonstrates her versatility as a performer.