Iwasa Mayuko is a former Japanese actress and entertainer born in Tokyo. She formerly belonged to Platinum Productions. As an actress, she is best known for her roles in "Galcir" and "Deep Love".

She was scouted in Shibuya in 2003. At the age of 16, she was selected as "Miss Magazine 2003" and made her debut in the entertainment world. She was an active and popular gravure model for a time.

As an actress, she starred in the 2004 TV series "Deep Love". That same year, she won the 42nd Golden Arrow Graph Award for her success as a gravure model. In 2014, she won the 23rd Japanese Professional Movie Awards for Emerging Actress for her performance in "Passion (Junan)".

On October 1, 2020, she reported on her own Instagram her retirement from the entertainment world. At the end of September of the same year, she revealed that after retiring, she would work towards being a long-term care worker.