Spend your fourth day exploring the cultural and historical attractions of Hakone. Begin by visiting the Hakone Shrine, a beautiful Shinto shrine nestled in the forested hills. Take a leisurely walk along the cedar-lined path leading to the shrine and admire the tranquil surroundings. Next, head to the Hakone Checkpoint Museum, which provides insights into the Edo period and the historical significance of Hakone as a checkpoint on the Tokaido highway. Learn about the samurai culture and the strict control measures implemented during that time.