Shiroishi Castle stands as one of only five authentic all-timber reconstructed keeps across Japan. This exclusive early-morning program invites you to participate in cleaning the serene castle interior, experiencing the spiritual culture of cleaning (souji) rooted deeply in Japanese life. In Japan, cleaning extends far beyond physical sanitation. Grounded in Shinto and Buddhist philosophy, purifying a shared space is regarded as a spiritual practice—a discipline to clear away stagnant energies (kegare) and cultivate mindfulness. Embrace the core aesthetics of self-reflection, gratitude toward physical surroundings, and consideration for the next visitor. As you polish the historical timber, discover a profound sense of inner clarity and serenity to start your day.