Siyamotsus Shrine can be found in the Gerudo Highlands Sky.

Shrine Location
Siyamotsus Shrine is located in Gerudo Highlands Sky at -1794, -3295, 1011.
Unlit Blessing
Although Siyamotsus Shrine looks like a Rauru's Blessing shrine, it is a fake Rauru's Blessing shrine. It is in fact a puzzle shrine in which you must shoot the unlit torches to reach the end.
Shrine Reward
The chest at the end of Siyamotsus Shrine contains a Mighty Construct Bow.