Japanese trowel/knife of some sort
penstemon (Mon, 16 Nov 2015 21:05:28 PST)

It is called a hori hori, it is a Japanese farmer's knife. I have one

too. Very useful.

Multiple hori hori here. The real thing.
http://hidatool.com/gardening/trowels-hori-hori/
Bob Nold
Denver, Colorado, USA