Since the beginning of our stay in Japan, we have Yakult for breakfast almost every day.
What is Yakult ? To french people, it could be described as an equivalent of Actimel. But it is a much older product for japanese people. A little bit of history:

Yakult (ヤクルト, : Yakuruto) is a Japanese probiotic milk-like product made by fermenting a mixture of skimmed milk with a special strain of the bacterium Lactobacillus casei Shirota. It was created by Minoru Shirota who graduated from the Medical School of Kyoto University in 1930. In 1935, he started manufacturing and selling Yakult. Official claims state that the name is derived from jahurto, an older form of jogurto, the Esperanto word for "yogurt".Since then, Yakult has also introduced a line of beverages for the Japanese market that contain Bifidobacterium breve bacteria, and has also used its lactobacilli research to develop cosmetics.

After its introduction in Japan and Taiwan, Yakult was first sold in the Western world in Brazil in 1966, due to the large number of Japanese immigrants in the country, before it was marketed elsewhere.
Today, Yakult is sold in 31 countries, although its bacteria cultures are provided from a mother strain from Japan regardless of production location.

Anyway, this is de-li-cious !!