The poster behind the woman was part of a campaign promoting the cleanliness and healthfulness of the Tokyo municipal water supply, as far as I can make out from it. The black text says, "Clean Water Makes Smiling Faces".
If you have ever seen some of the "Engrish" phrases used as decoration or ad copy in Japan and wondered how they ever came up with anything that odd....well they quite often manage to do very nearly the same thing in Japanese.
Pentax K20D
Takumar 105/2.8 (Preset)