Before prototyping the store’s signature Water-in Soap in 2012, Tanaka had 20 years of research and development experience at Procter & Gamble Japan KK, part of the U.S. entity that sells ...

The Blue Stick soap, billed as a “superstar stain remover,” is the top-selling item among a range of products manufactured by prison labor at correctional institutions across Japan.

But not just any milk, mind you. There's the fabled Hokkaido milk, treasured in Japan for its creaminess and quality. Besides ...