black and white striped funeral curtain
A curtain with alternating black and white vertical stripes, traditionally hung at Japanese funerals and wakes. The pattern resembles the belly of a whale, hence the name.
A black and white striped curtain was hung at the entrance of the funeral hall.
From 鯨 (whale) + 幕 (curtain), because the black and white stripes resemble the pattern on a whale's belly.