Oshozan-u Shrine is in the northeast part of North Tabantha Snowfield, north of Snowfield Stable.
Shrine Location
Oshozan-u Shrine is located at -1402, 3677, 0287. It can be found north of Snowfield Stable, in the northeast part of North Tabantha Snowfield.
Mallet Smash
Attach the log sideways to the cube so it is pointing away from the rail, then attach the rocket to the back of the cube, then hit the rocket to launch it up the rail. The log will hit the wall target and activate it, opening the bars. Before you go through, detach the log, and take it with you through the bars.
Lean the log up against the groove in the ledge to the left, then climb up the log to reach the chest. It contains a Zonaite Bow.
Next, attach a long log to the nearest tooth of the wheel on the wall. Then attach the rocket sideways to one of the ends of the short log, and attach the short log to another of the wheel's teeth such that the wheel will spin in the direction that will make the long log hit the wall target. Shoot the wheel with an arrow or try to hit the log with a non-sharp, blunt weapon (to avoid breaking it and turning it into wood). When the long log hits the target, the bars open. Go through and check on the dragon ring to get a Light of Blessing and complete the shrine.