August 15th is Korea's Liberation Day,... but the day is an important one for Japan, too,... as it marks the anniversary of its defeat by the Allies in World War Two and the loss of its empire.
And on Wednesday, Japanese Prime Minister Shinzo Abe sent a ritual offering to the controversial Yasukuni war shrine... to honor Japan's war dead.
Abe didn't go in person, but sent the offering with his special adviser.
The shrine is controversial because it also honors Class A war criminals.
Paying tribute there is seen in Korea and China as a symbol of Japan's past militarism, but Abe has sent an offering every year since he took office in 2012.
The South Korean foreign ministry has expressed "deep concerns" over the leaders of the Japanese government and parliament paying tribute to a shrine that glorifies Japan's history of aggression.