Zakusu is a Surface shrine in the Mount Lanayru region on the Mount Lanayru Skyview Tower map near Naydra Snowfield

In the Mount Lanayru Depths below is the Usukaz Lightroot

The trial in this shrine is Proving Grounds: Ascension

Completing the quest The High Spring and the Light Rings will grant passage to this shrine

Zakusu contains Strong Zonaite Spear