Aiko Sada, Ph.D.

Principal Investigator

Aiko Sada received a Ph.D. in 2011 from the Graduate University for Advanced Studies, Japan. Soon after her graduation, she joined Dr. Tudorita Tumbar’s laboratory at Cornell University, as a postdoctoral fellow, where she worked on identification and characterization of epidermal stem cells. In 2016, she started as a tenure-track Assistant professor at University of Tsukuba. In 2019 October, she was promoted to Associate professor and started her own laboratory at IRCMS, Kumamoto University. 

Erna Raja, Ph.D.

Postdoctoral Fellow

Hi, I am currently working on skin stem cell aging with Dr. Sada. We are interested in the aging mechanism due to cell intrinsic factors, microenvironment and cell-cell interaction. Research life has been exciting and gives me the chance to meet and learn from many different cultures.

In my free time I enjoy gardening, fishing, nature walk and eating good food! 

Nguyen Thi Kim Nguyen

Postdoctoral Fellow

Hi, my name is Nguyen. I am from Vietnam. 

I graduated from the University of Tsukuba and now I am working at Sada lab. as a postdoc. I am interested in skin stem cells and aging. I hope that my research will contribute to the understanding of skin aging and can be applied to prevent aging in the future. 

Yen Xuan Ngo

Ph.D. student

Hi, I come from Vietnam and currently be interested in oral epithelial stem cell and tissue engineering. I love research and mouse experiments because sciences are full of curiosity and imagination. I have chance to travel, meet and work with people from different cultures. What I would do if I have free time: I prefer reading books, travelling and exploring good food.

Takako Keida

​Laboratory Technician

Takako has been working in Kumamoto University for 20 years! She joined Sada lab in 2020 April. 

Yuka Endo

​Administrative Assistant

Yuka supports administrative work.

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E-mail: aisada (at)




Aiko Sada, Ph.D.

Associate Professor

International Research Center for Medical Sciences (IRCMS), Kumamoto University


E-mail: aisada (at)

2-1-1 Honjo, Chuo-ku, Kumamoto City

860-0811, Japan

©︎2019, Sada Laboratory, IRCMS, Kumamoto University.  ©2010 kumamoto pref. kumamon. #K32035