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Under Ikeda's cabinet, Tanaka became chairman of the Policy Affairs Research Council, and eventually Minister of Finance. Tanaka's term as minister of finance saw some of the highest economic growth in Japanese history. When Satō became prime minister in 1965, Tanaka was slated to become the LDP's new secretary general, but the emergence of the Black Mist Scandal, where Tanaka was accused of shady land deals in Tokyo, meant that Takeo Fukuda got the job instead.