is a Japanese professional volleyball player. She plays in the SV.League for Saitama Ageo Medics.
In her second and final year of high school, she won the All Japan High School Championship.
In 2017, Iwasawa was selected to represent Japan at FIVB Volleyball Women's U21 World Championship in Mexico where the team finished with Bronze medal.
In March 2018, Saitama Ageo Medics announced that she would join the team. As Akane Yamagishi was the regular libero on the team, she was unable to secure a regular starting position and mainly came on as a subtitute receiver.
In the 2022-23 season, she made her starting member debut in the V.League Division 1 opening match against NEC Red Rockets. The team won the match in straight-sets victory. She also played as the starting libero in the second match against NEC, making a series of excellent receives and contributing to the team's winning streak. She also received the VOM (V.League of the Match) award.
In 2023, she was selected as a member of Japan women's national volleyball team for the first time.
In 2025, she was selected for the VNL first week's round in Canada. She was registered as an outside hitter rather than libero because she was a substitute receiver. On June 8 the same year, she made her national team debut as a libero in the match against the Dominican Republic in the same round. She supported the team with tenacious defense and contributed to the team's straight-sets victory.