It's not surprising that last week Haruko Obokata issued a plea for privacy. On Jan. 29 she published a scientific paper on stem cells that could revolutionize medicine, and overnight the researcher based at the Riken Center for Developmental Biology (CDB) in Kobe became a domestic and international star.

The onslaught of media attention went beyond what Obokata had discovered — a way to revert ordinary cells from the body into kansaibō (stem cells), cells with the ability to develop into any cell type. These cells, known as pluripotent stem cells, have long been seen as the key to regenerative medicine, because in theory they can be grown into new organs and tissues.

As a young female scientist, Obokata is something of a rarity in Japan, and many reports included details of her life it's hard to imagine being discussed if she was a man. Her laboratory is painted pink and yellow, and is decorated with pictures of Moomin characters from children's books.