A traditional Japanese grass sickle with a very sharp high carbon blade. Good for cutting grasses and light clearing. In comes in various weights depending on your projects.  Once you use one you will want your grasses to grow just so you can feel the clean cutting of this tool.  Light kama for normal grasses with very  light brush.  Medium kama for heavy grasses and brush. Heavy for brush up to 1/2 diameter.

In Picture- Light is first one on left, Medium in middle and Heavy on right.