I argue that the Liberal Democratic Party (LDP) of Japan employed a strategy to prevent unpopular prime ministers from tainting the party’s image. Time-series analyses of public opinion data from 1960 to 2006 show that national economic performance had modest effects on prime minister support ratings and no effects on LDP ratings. When prime minister ratings fall below party ratings, cabinets are more likely to be reshuffled and prime ministers to be replaced to avoid having the cabinet’s negative image ‘rub off’ on the LDP. Although electoral rules, culture, and other factors surely play a role in sustaining the LDP, I show for the first time that the party manages its cabinet personnel strategically to maintain support.