Rin' is an all-female Japanese pop group which combines traditional Japanese musical instruments and style with elements of modern pop and rock music. It is a female trio of Tokyo National University of Fine Arts and Music alumni who graduated in 2003. The band made their performing debut in December 2003, at Meguro Gajoen, and in April 2004, their first single, called Sakitama, was released by avex trax.

Chie Arai and Mana Yoshinaga play koto, sangen, and jushichi-gen, while Tomoca Nagasu plays biwa and shakuhachi. All three perform vocals.

According to the band's website, the name Rin' comes from the English word 'ring', the Japanese word Wa (和, meaning both 'ring' and 'Japanese-style'), and from the trio's hope to create a 'ring', or circle, of music.

Since their debut, the band has performed in many venues around the world, and have released four singles and several albums. A number of their songs have been used as themes for anime and movies, most notable is Fuhen used in the Samurai 7 anime.

Their chief international album, Inland Sea, was released worldwide: in Europe and the United States on April 25, 2006 and in Japan on August 30, 2006, featuring guest performances by Leigh Nash and Lisa Loeb.

According to the band's website, as of 13 February 2009, Rin' had put an end to their activities and decided to disband.

After 10 years, the group announced their reunification on their official websites on March 8, 2019, and thereafter released the single Koumyou in the same year, held a number of concerts, and released a new album HORIN in 2021. .