Lift HIMARI or SORA off the sleeping surface each morning so the underside and the floor or frame can dry. Beyond that daily habit, our suggested routine is to air both sides and turn and rotate the shikibuton every one to two weeks in dry weather, and to dry it sooner whenever either surface feels damp. Wash the removable sheet or cover weekly.
A simple routine
- Every day: fold it into thirds or stand it against a wall so the underside can release moisture.
- Every week: wash the sheet or fitted cover.
- Every one to two weeks: air both sides, then turn the shikibuton over and rotate it head to foot so normal pressure and settling are spread more evenly.
- Whenever something spills: blot and spot-clean straight away, then dry the area completely.
How to air it
In Japan, futons are traditionally aired on a dry, sunny day from late morning to early afternoon, and brought in before the evening air turns damp. Air one side, then turn it over. A balcony rail, a drying rack or two chairs by an open window all work. Where outdoor airing is not practical, stand it up indoors near an open window or a fan, with a dehumidifier running in humid weather.
Afterward, smooth the surface with your hand or a soft brush rather than beating it hard, which can disturb the filling.
When to air more often
Increase the routine during rainy or humid spells, when the shikibuton lies on a non-breathable floor, and in homes with children or pets.