
1) Throwing weapon
Found on
https://www.crosswordclues.com/clue/kunai

A kunai is a Japanese tool possibly derived from the masonry trowel. Two variations are the shō-kunai and the dai-kunai. It is a good example of a basic tool which, in the hands of a martial arts expert, could be used as a multi-functional weapon. It is commonly associated with the ninja, who used it to gouge holes in walls. == Design == The kuna...
Found on
http://en.wikipedia.org/wiki/Kunai

The Kunai was a small dagger-type tool that served primarily as a utility knife. It's secondary use was as a weapon, with a sharp point and short handle it was a great throwing weapon. It was also a great close combat weapon as it could be used in very tight situations.
Found on
http://www.swordsknivesanddaggers.com/ninja-weapons-glossary.html
No exact match found.