The Hyakki Gokoku is a hyper-stylized, ornate weapon resembling a massive, curved blade with intricate engravings depicting mythical creatures and battle scenes. Its surface is a mix of polished metal and glowing, luminous accents, suggesting a magical or enhanced nature. The blade's proportions are exaggerated, with a wide, sweeping curve and a thick spine, making it both visually imposing and indicative of its powerful slashing capabilities.