Famous koan are such as 'Sekishu no koe' (the sound of one hand), 'Kushibussho' (whether a dog have the Buddha-nature) and 'Soshi Seiraii' (why the Dharma came from the west).
有名な公案として「隻手の声」、「狗子仏性」、「祖師西来意」などがある。