Kasumi Arimura is a Japanese actress who was born on February 13, 1993, in Hyogo Prefecture, Japan. She began her entertainment career in 2009 after successfully auditioning for the talent agency FLaMme. Her early work was focused on live-action television and film, with a breakthrough role in the 2013 NHK morning drama Amachan bringing her widespread recognition.

While primarily known as a live-action actress, Arimura has also participated in voice acting for animated films. Her role as Marnie in the 2014 Studio Ghibli film When Marnie Was There marked a significant entry into anime voice work. In this film, she provided the voice for the mysterious title character, marking one of the few instances where Studio Ghibli featured two female protagonists voiced by actresses. This performance was part of an acclaimed production that received a nomination for the Academy Award for Best Animated Feature.

In 2019, Arimura voiced the character Bianca in the CGI anime film Dragon Quest: Your Story. The film is an adaptation of the popular game Dragon Quest V: Hand of the Heavenly Bride and featured a prominent cast that included Takeru Satoh as the protagonist.

Information about recurring collaborations with specific directors or voice actors is not extensively documented, as her voice roles have been limited. Similarly, while she has received numerous accolades for her live-action performances including multiple Japan Academy Film Prizes, specific awards for her voice acting work are not recorded in available sources. Her contributions to anime remain a distinctive but secondary aspect of her career as a celebrated Japanese actress.