35 Sento is holding the event at Oota-ku. it is stamp rally. if you get all stamp at Sento you can get some present.
“Sento” means Bath house in Japanese.
Tuesday 9 September to Sunday 30 November, 2014
website: http://www.ota1010.com/event.cgi?code=&page=ota1010_201409001.dat(only in Japanese)