Goraishi

Goraishi is Koga's weapon which he recieved from his ancestors. It is a powerful heirloom of the Wolf Demon Tribe. It creates energy blasts that are equal to that of a fully-powered Wind Scar. The Goraishi has literally became a part of Koga.

When Koga entered the graveyard of the Wolf Demon Tribe, he sought out the tribe's most valued treasure, the Goraishi. After he selflessly abandoned the treasure in order to save Ginta and Hakkaku from the grave guardian's flames, he was bestowed the claws. Koga was told that the claws will help ward off Midoriko's influence on Koga's Shikon shards.