Araki Ryu

Araki Ryu is just one of many Ryuha that uses the name 'Araki Ryu' . Most of the Ryu name Araki Mujinsai (c 1550) as the founder or originator of the Ryuha

Tempered with a black finish

This is a variant of the Shuriken from the Araki Ryu Gunyo Kogusoku