Minoru Shirota, Japanese physician and microbiologist, invented Yakult (died 1982)

Minoru Shirota was a Japanese microbiologist. In the 1930 Shirota identified a strain of lactic acid bacteria that is part of normal gut flora that he originally called Lactobacillus casei Shirota, which appeared to help contain the growth of harmful bacteria in the gut. The strain was later reclassified as Lactobacillus paracasei Shirota.

Yakult is a Japanese sweetened probiotic milk beverage fermented with the bacteria strain Lacticaseibacillus casei Shirota. It is sold by Yakult Honsha based in Tokyo. The name "Yakult" was coined from jahurto, an Esperanto word meaning "yogurt".