1. 
   Tosu
   Lavatory of a Zen Monastery
   Found op http://www.horne28.freeserve.co.uk/zenglos.htm
   
   
2. 
   Tosu
   city, Saga ken (prefecture), Kyushu, Japan, in the Tsukushi Plain, on the Chikugo River. It was a post town for centuries, connecting northern Kyushu ...
   Found op http://www.britannica.com/eb/a-z/t/65
   
   
3. 
   TOSU
   An ancient short dagger worn on court dress.
   Found op http://www.samuraisword.com/glossary/index.htm
   
   
4. 
   tosu
   1) Lavatory of a zen monastery
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/tosu/1
   
   

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