With the close of the extraordinary Diet session on Dec. 9, some of the largest opposition parties once again entered talks about merging before year's end, with an eye toward increasing their seats in the next general election. Here's a look at the talks and what they might mean for Japan's political scene in 2020.

Which opposition parties are talking?

The Constitutional Democratic Party of Japan, the Democratic Party for the People and the Social Democratic Party are the three main parties discussing a merger.