Wind tunnels (Kaza-ana), or "The Place from Which Cold Wind Blows" if translated literally, is a series of caverns and tunnels that fill the mountainous region of central Hokkan, north, and east of the city Touran. It is a complex maze allowing wind from one area to reach many other places. Somewhere in these caverns, King Tegiru is hiding Tegu. In the event that Tegu 'sings', the noise carries and can affect the Seishi if they are near any part of Kaza-ana.

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