I set out with a goal to make some scrap shivs.  I picked up one piece that had this curved blade shape and a bend in the middle that was similar to this.  It didn't take long to fill in the rest.  This knife kind of drew itself.  
 
Sasu in Japanese means to sting or stab. 
 
In spite of its minimal shape and size this is very comfortable in hand and lends itself to multiple grips.  
 
3/16" thick 1095 with forge finish.  Kydex sheath.  
 
Just under 6" overall with a sharpened edge just over 2"