What does the blue cloth mean?

Blue mourning refers to a traditional Japanese cultural costume, usually made of blue woolen cloth, which is often used to express mourning. According to traditional Japanese customs, people with different identities will have different colors and styles of mourning clothes after death. Under normal circumstances, after the death of elders, the descendants of ordinary relatives will bring white cloth to express their filial piety and sadness. In some cases, relatives may choose to wear blue mourning clothes to show their respect and condolences to the deceased.