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Iō-zan

This hissing mountain (512m), a couple of kilometres south of Kawayu Onsen, is stained sunshine-yellow in patches from sulphur. Locals steam eggs in the hot volcanic vapours for a speciality known as onsen-tamago. Chances are you'll hear the sellers calling 'Tamago! Tamago! Tamago!' (Eggs!) even before you reach the car park.

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Must-see attractions

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