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The ninja's concealed throwing weapon

Shuriken are small Japanese throwing weapons in two types: star-shaped shaken and needle-shaped bo-shuriken. While depicted as a ninja's primary weapon in popular culture, they were actually secondary weapons used for distraction and harassment — NOT direct killing. Their primary role was diverting an enemy's attention or delaying pursuers during escape. Shaken measure approximately 10-15cm in diameter, bo-shuriken 15-25cm in length, and multiple could be concealed in clothing or sashes. Applying poison greatly increased their effectiveness.

A multipurpose ninja tool and throwing weapon

The kunai is originally a Japanese multipurpose masonry and gardening tool, featuring a thick, leaf-shaped iron blade with a ring pommel. At 20-30cm blade length, it was originally used for digging walls and making holes, becoming famous when ninja (shinobi) adopted it as an all-purpose tool-weapon. Uses included driving into walls as footholds, attaching rope as a grappling hook, and wielding as a close-combat dagger. Though depicted as a throwing weapon in popular culture, its heavy weight and poor aerodynamics actually make it an inefficient projectile.

A silent tube weapon firing poison darts

The blowgun is a weapon that propels poison darts through a thin tube of 100-300cm by blowing with the mouth. The weapon itself has virtually no lethality — it only becomes effective with poisoned darts (curare, plant toxins, etc.). Effective range of only 10-30m, but its near-silent discharge makes it ideal for ambush and surprise attacks. Independently developed by hunting peoples in tropical/subtropical regions: South American Amazon, Southeast Asian Borneo, and Japan's fukiya. Curare poison paralyzes respiratory muscles; without poison, the darts are not lethal even to small animals.