A cleansing ritual used by shugenja when preparing a house or other building for an important even such as a wedding or a festival. The spell entreats the Air kami to raise a soft but carefully controlled wind which sweeps all the dirt, insects, and other filth out of the building. The spell also has a spiritually purifying effect, making evil or malignant spirits reluctant to remain within the dwelling - any kansen, ghosts, or other hostile disembodied spirits within the building will leave for a number of hours equal to the caster's Air. (Evil spirits which are exceptionally strong or which have an extremely strong attachment to the building cannot be banished by this basic spell, however - it is the GM's discretion whether a spirit is strong enough to resist Freedom of the Air.)
The spell was originally devised by the Seppun shugenja, but due to its great usefulness it later spread across the Empire. The Seppun Shugenja School technique may be applied to this spell.