Japan's economic security strategy will focus on two pillars of "strategic autonomy and indispensability," a top ruling party official said on Saturday, as the nation faces an increasingly assertive China.

Akira Amari, secretary general of the Liberal Democratic Party (LDP), has in recent years driven a policy push for Japan's economy to be less reliant on other countries, while investing in areas that are indispensable to other countries.

"'Autonomy' means understanding our chokepoints and rectifying them," Amari said in a video message to the Mt. Fuji Dialogue, a meeting of experts on the U.S.-Japan alliance "'Indispensability' means securing the chokepoints of others."