Revising the Constitution, injecting new life into the moribund economic recovery and embracing a more diverse society were just some of the policy measures adopted at the ruling Liberal Democratic Party's annual convention Sunday.

"I will never allow Japan to degenerate into the situation three years ago where politics were in disarray, the economy was stagnant and an air of gloom enshrouded Japan," Prime Minister Shinzo Abe said, referring to the Democratic Party of Japan's first stint in power from 2009 to 2012.

As his conservative party prepares for the crucial Upper House election in July, the LDP will attempt to revise the Constitution while retaining its fundamental principles, including protection of basic human rights and an adherence to pacifism.