The nation on course to choose female prime minister in historic first
Over the last two decades, Japan has seen more than 10 leaders.
In fact, one expert likens assuming the nation's highest office to drinking from a "poisoned chalice".
But why does Japan frequently replace prime ministers? It's due in part of it being a "single-party system", says Professor James Brown of Temple University in Japan.
The LDP's grip on the political landscape means the main political competition comes from within the party, instead of from external parties.
"So within the LDP there are intense conflicts within various groups - they all desire their own clique to get the leadership position."
"So even though you could be chosen as prime minister, the moment you're in office, you have many individuals scheming to try to get you out again."
Key Factors Behind Rapid Turnover
- Single-party rule restricts outside challenges
- Internal factional rivalries fuel power struggles
- The leadership role is often described as a "poisoned chalice"
- Government continuity stays difficult to achieve despite financial power
