Split curtain used in place of doors as entrances to Japanese shops, and as doorways and decorations inside Japanese homes
in the past were typically dyed navy blue with the shopkeepers
insignia in white. They fell out of use during the early part of the 20th
century, but many Japanese-style restaurants still hang them in their
entrances. They are still common in homes as well.
" relates to the craft, Somemono
the process of dyeing textiles such as silk and cotton with natural dyes
such as indigo.