TOKYO - Japan's government announced Friday the replacement of a senior official and close aide to Prime Minister Sanae Takaichi, in a de facto dismissal following a reported extramarital affair that involved state-funded business trips.

Tadashi Mogi, a secretary to Chief Cabinet Secretary Minoru Kihara on secondment from the Ministry of Economy, Trade and Industry, will be replaced by Keisuke Sasaki, director general for policy planning and coordination in the ministry, on Tuesday, according to the government.

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