The Constitution's war-renouncing Article 9 is in danger of being revised by Prime Minister Shinzo Abe and the upcoming Upper House election is an opportunity to put a stop to this effort, Social Democratic Party leader Mizuho Fukushima said.

"The Upper House election is a chance (for the public) to cast a vote of no confidence against Prime Minister Shinzo Abe and his Cabinet," Fukushima said in a recent interview with The Japan Times.

Abe has repeatedly said he plans to revise the Constitution, which was drafted in 1947 during the Allied Occupation. He has cleared the first major step by getting a bill passed to establish procedures for a national referendum to revise the charter.