1930
  Dr. Minoru Shirota succeeds in culturing and utilizing lactic acid bacteria (Lactobacillus casei strain Shirota).
1935
  Yakult is introduced in the Japanese market.
1938
  Yakult is registered as a trademark.
1940
  Local offices of the Association for Promotion of Preventive Bacteria Strain Shirota are established in various parts of Japan for the purpose of marketing and distributing Yakult.
1955
  Yakult Honsha Co. Ltd. is established. (Nishi Hatchobori, Chuo-ku,Tokyo) Research Institute is established in Kyoto.
1963
  Yakult launches its unique Yakult Ladies system of door-to-door distribution in Japan.
1967
  Yakult Central Institute for Microbiological Research is established in Kunitachi, Tokyo.
1968
  Yakult is introduced to the market in a new plastic container.
1972
  Program of regular visits to senior citizens by Yakult Ladies begins.
1981
  Company stock was listed on the first section of the Tokyo Stock Exchange
1998
  Yakult is approved by the Ministry of Health and Welfare for labeling as Foods for Specified Health Uses (FOSHU).
2005
  Decision made to enter the Indian market in alliance with Groupe Danone.
2007
  Production facility of Yakult in India completed and product launched.