A friend of mine showed me this picture.
Hokkaido 37 Mother's Milk
- Refreshing Breasts -
− さわやか乳房 −
I searched online if it is still available and to know more about this, and I came across a blog by a Japanese man, the date is in 2006, saying that it is not a Japanese product but a Taiwanese one copying Japanese.
But we Japanese do not have this kind of product!
And usually the number before Milk is like 3.7 to show the percentage of butterfat.
What I imagine from this number is;
The production is depending on only 37 of girls and women who are all from Hokkaido.