Mori was born in Japan, but has spent time living in both the United States and Italy, the latter of which being where she studied opera. She attributes her pursuit of a career in theatre to seeing the musical "My Fair Lady" in London as a young woman. Her participation on a diet reality television show, where she lost weight following a 'banana diet' led to a significant increase in banana sales in Japan. She is married.
She has presented a number of television shows in Japan, including Disney Japan's "Disney Paradise", and has also done both voice over and traditional acting. She is best known in the West for her appearance on Disney's "The Suite Life of Zack and Cody", where she appeared as herself.
Her theatre work includes over 2,000 appearances as Madame Thenardier in the Japanese stage production of "Les Miserables", and she has appeared on over 30 CDs, including two of her own.
As well as her acting and singing, Mori has published a cookbook of original recipes.
Mori attracted controversy in when she unwittingly found herself embroiled in an investigation into the apparent suicide of Tadayo Honda, former director of the Bank of Japan, whose death is suspected as murder, as she was staying in the hotel room next to him, and had updated a message board complaining about disturbances coming from Honda's room.
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