The nation set to choose female prime minister in historic first
Over the last two decades, the country has had more than 10 leaders.
Actually, a specialist likens assuming the nation's highest office to taking a "cursed cup".
But why does Japan frequently replace prime ministers? This is partly because of it being a "single-party system", says Prof James Brown of Temple University in Japan.
The Liberal Democratic Party's control on the country's politics means the main political competition comes from inside the party, rather than from external parties.
"Therefore inside the LDP there are vicious struggles within different factions - they all desire their own faction to get the leadership position."
"Thus although you might be selected as prime minister, the moment you're in office, you have many individuals manoeuvring to try to get you out again."
Main Reasons Behind Rapid Turnover
- One-party dominance restricts outside challenges
- Party infighting fuel power struggles
- The leadership role is often described as a "poisoned chalice"
- Government continuity remains elusive despite economic strength