Nanase Iwai is a Japanese actress and model who was born on April 23, 1989, in Kanagawa Prefecture, Japan. She began her career in entertainment after winning a audition held by her talent agency, Itoh Company, in 1999. Her early work included being a regular performer on the NHK Educational TV programs "Tenshi no Child" and "Tenshi no Child MAX" from 2001 to 2004, as well as modeling for the fashion magazine "Love Berry" for six years.

Iwai has worked primarily as a live-action actress, with numerous credits in television dramas and films. Her live-action roles include appearances in the drama series "Tantei Gakuen Q" and a guest role in the live-action adaptation of "Ouran High School Host Club". In 2008, she announced a temporary retirement from the entertainment industry but resumed her career in 2009.

As a voice actor, Iwai is known for her role as Rin Shiraki in the acclaimed anime film "In This Corner of the World" (2016) and its extended version "In This Corner (and Other Corners) of the World" (2019). The character of Rin Shiraki, who appeared only briefly in the original film, became a central focus of new sequences added to the extended version. Beyond this notable voice role, information about extensive voice acting work or recurring collaborations with specific directors or studios is not readily available in the search results. Her credited work consists predominantly of live-action performances, with the role of Rin Shiraki standing as her primary identified contribution to anime voice acting.