The nation on course to elect woman prime minister in landmark first
Over the last two decades, the country has seen more than 10 leaders.
Actually, one expert likens taking up the nation's highest office to taking a "cursed cup".
However, what is the reason does the country keep changing prime ministers? It's due in part of it being a "one-party democracy", explains Prof James Brown of Temple University Japan.
The Liberal Democratic Party's control on the political landscape means the main political competition comes from inside the party, rather than from external parties.
"So within the LDP there are intense conflicts within different factions - they all desire their own faction to get the top job."
"So even though you could be selected as prime minister, as soon as you're in power, you have many individuals manoeuvring to try to get you out again."
Key Factors Behind Rapid Turnover
- Single-party rule limits external competition
- Party infighting fuel power struggles
- The prime minister's position is often described as a "cursed position"
- Government continuity stays difficult to achieve despite economic strength
