Saori Hayami Congratulates Nobel Laureate Shimon Sakaguchi for Discovering Regulatory T Cells
Voice actress Saori Hayami, who portrayed the Regulatory T Cell in the anime Cells at Work!, congratulated Osaka University’s Shimon Sakaguchi after he was awarded the Nobel Prize in Physiology or Medicine. Sakaguchi was recognized for his discovery of regulatory T cells, which suppress excessive immune responses.
Quick Summary
・Shimon Sakaguchi of Osaka University won the Nobel Prize in Physiology or Medicine.
・His award recognizes the discovery of regulatory T cells that suppress immune overreactions.
・Voice actress Saori Hayami voiced the Regulatory T Cell in Cells at Work!.
・Hayami congratulated Sakaguchi on X (formerly Twitter).
・She expressed interest in learning more about regulatory T cells.

Saori Hayami, photographed by Ruka Ueno (© ORICON NewS inc.), voiced the Regulatory T Cell in Cells at Work! and congratulated Nobel laureate Shimon Sakaguchi.
Saori Hayami’s Message on X
Hayami updated her official X account to share her congratulations. She wrote, “Congratulations on your award!” and added, “I had the honor of voicing the Regulatory T Cell in Cells at Work!. This news inspires me to learn more about regulatory T cells once again.”

Saori Hayami, photographed by Ruka Ueno (© ORICON NewS inc.), voiced the Regulatory T Cell in Cells at Work! and congratulated Nobel laureate Shimon Sakaguchi.
受賞おめでとうございます!
— 早見沙織 Official (@hayami_official) October 7, 2025
「はたらく細胞」という作品で制御性T細胞 役で出演させていただいておりました。これを機に、あらためて制御性T細胞について知っていきたいと思います!(早) https://t.co/v5UTVZLNfT
About the Regulatory T Cell in Cells at Work!
According to the anime’s official website, the Regulatory T Cell plays the role of preventing overactivation of T cells and maintaining immune balance. Hayami’s portrayal highlighted the character’s composure and responsibility in regulating immune functions within the series’ anthropomorphic cell world.
Shimon Sakaguchi’s Nobel Prize Recognition
Shimon Sakaguchi, a specially appointed professor at Osaka University, received the Nobel Prize in Physiology or Medicine for discovering regulatory T cells. His research shed light on how the immune system controls overactive responses, forming the basis for numerous medical advances.
Frequently Asked Questions
Q1: Who is Saori Hayami?
A1: Saori Hayami is a Japanese voice actress known for her roles in anime series such as Cells at Work!, where she voiced the Regulatory T Cell.
Q2: What is Shimon Sakaguchi known for?
A2: Shimon Sakaguchi is recognized for discovering regulatory T cells, immune cells that suppress excessive immune responses.
Q3: What role did Saori Hayami play in Cells at Work!?
A3: She voiced the Regulatory T Cell, a character responsible for maintaining immune balance by controlling other T cells.
Q4: What did Saori Hayami post on X?
A4: She congratulated Sakaguchi and mentioned her desire to learn more about regulatory T cells after portraying one in the anime.
Q5: What does a Regulatory T Cell do?
A5: A Regulatory T Cell suppresses the excessive activity of T cells, preventing immune system overreactions and maintaining stability.
Source : ORICON NEWS