Visit on a designated worship opening day (1st, 13th, 15th, 24th of each month, plus weekends and holidays) if you want to receive prayers or a Goshuin stamp from the shrine priests, as the shrine only has staffed services on these specific dates.
Bring a windbreaker or warm layer even on mild days below, since the summit sits at 1,356 meters where weather conditions differ significantly from the base of the mountain and winds are consistently strong.
Look for the Bakoseki Stone (also called Umayoriishi) near the shrine entrance, which locals believe marks where a deity descended on a white horse, and check the small hole in the stone said to never dry up even during droughts.
Visit on a weekday morning rather than weekends to experience the shrine with fewer visitors and a quieter atmosphere that better suits the sacred setting in Yumoto's hot-spring town.
Wear comfortable walking shoes since the shrine sits in Hakone's hilly terrain near Hakone-Yumoto station, and you may want to explore the surrounding hot-spring area on foot after your visit.
Ask shrine staff or attendants before taking photos inside the main worship areas, as some Shinto shrines restrict photography in certain sacred spaces to maintain the spiritual environment.