Let me share with my review.
They recommends to use 2 cm to use.
Add water to make bubble. It was really easy to make, the bubble is so soft.
In person, and my preference, 2cm is too much. I may use 1 cm or 1.5 cm.
The perfume is unique, sweet floral, maybe rose, and not so strong.
Some Japanese reviewers say their face turned brighten or soften, but I did not feel that.
I felt it wash well, but my skin afterward was not too dry. Nice product. I guess this is a gently face wash. I guess this is not for oily skin, I think it is adrable for dry skin (like me).