Osake Shrine is a holy site where the spiritually minded gather to pray. You can do the same, or respectfully observe others as they worship.
If you're spending a while in Ako, Osake Shrine is a good place to start your exploring. This sacred place is one of numerous attractions that'll keep you busy here. Ako Kaihin Park, Ako City Museum of History, and Ako Marine Science Museum, Salt Country are also waiting for you nearby.