As Sunday's Lower House election draws closer, the Liberal Democratic Party will be paying close attention to benchmarks that measure voter turnout, women's political representation and the number of seats that would make or break the ruling party. Here are the key numbers to watch:

52

Voter turnout may fall to a record low for the third consecutive Lower House election, with rain expected nationwide on Sunday. The turnout in the previous December 2014 election, stood at 52.66 percent, which was down 6.66 percentage points from 2012.