Japan has demanded that Pyeongchang 2018 Olympics organizers correct a map on its official website which had Japan missing.

The Japan Sports Agency says it spotted the problem Wednesday, after receiving a number of calls from the public. It said it demanded a correction via the South Korean Embassy in Tokyo.

The world map on "Dream Program" section of the website has since been corrected.

Agency official Masahide Katsumata said Japan was omitted from the map early Wednesday when he checked it.

An official from Pyeongchang organizing committee said Japan's omission was a "simple mistake" caused by changes in image files when organizers updated the Olympic website in February.

The two countries have had past disputes over Japan's wartime aggression and territorial issues.