Is this shop open, or closed? Here are some signs to look for to help you find out.
Key expression: 営業中 eigyō-chū (open [for business])
Variation: 商い中 akinai-chū (open [for business])
Key expression: 準備中 junbi-chū (lit. now preparing = closed)
Variation: 支度中・仕度中 shitaku-chū (closed)
↑ せっせと仕度中 sesse to shitaku-chū (going all out to get things ready = closed. Humorous)