The flag of Indonesia is or has been flown half-mast during several occasions : The flag of Japan is flown at half-staff upon the death of the Emperor of Japan , other members of the Imperial Family , or a current or former Prime Minister , and also following national disasters such as the 2011 Tōhoku earthquake and tsunami . In addition to the tradition of half-staff , the national flag topped by black cloth may be flown to designate mourning . See the flag of Japan for more
2011 Tōhoku earthquake and tsunami
2011 Tōhoku earthquake and tsunami
Half-mast