“The historical mission of the LDP has been completed,” said Koichi Kato, the secretary general of the LDP.
The LDP was created in 1955 and remained in power for the rest of the Cold War. The Japan Socialist Party was its primary opposition. Presumably, the “historical mission” of the LDP was to keep the communists at bay and keep Japan aligned with the West throughout the Cold War. Once the Cold War ended, the “historical mission” of the LDP had ended.
Perhaps it is time for something new...