The nation set to choose woman prime minister in landmark first
Over the last two decades, the country has had over ten prime ministers.
In fact, a specialist likens assuming the nation's highest office to drinking from a "cursed cup".
But why does Japan frequently replace leaders? This is partly because of it being a "single-party system", says Professor James Brown of Temple University in Japan.
The Liberal Democratic Party's control on the political landscape means the main political competition originates inside the party, instead of from external parties.
"So within 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, as soon as you're in office, you have dozens of people manoeuvring to try to get you out again."
Key Factors Behind Frequent Changes
- Single-party rule restricts outside challenges
- Party infighting drive leadership contests
- The leadership role is frequently called a "cursed position"
- Government continuity stays difficult to achieve despite financial power
