Eternal Heart or Undying Pearl is a 1929 Japanese silent drama film directed by Hiroshi Shimizu.

Soon after their wedding, Narita, distraught over Reiko's lightweight manners and materialistic attitude, asks Toshie to exert her influence on her sister.

Katayama, Toshie's superior and a widower, proposes to her, but after meeting with his children and nieces, who mock her for being a simple typist, she leaves indignantly.

Reiko, bored with her marriage life, meets with a former lover, which leads to a confrontation and crisis between the couple.

[4] Archive prints of Fue no shiratama have been screened at the University of California in 2005,[5] at the Cinémathèque française in 2020 and 2021,[6] and at the Museum of Modern Art in 2022.