The nation on course to elect female prime minister in landmark first
Over the last two decades, the country has seen over ten prime ministers.
Actually, a specialist likens taking up the country's highest office to drinking from a "poisoned chalice".
But why does the country keep changing prime ministers? This is partly because of it being a "one-party democracy", says Professor James Brown of Temple University Japan.
The LDP's grip on the political landscape means the primary rivalry comes from inside the party, rather than from opposition groups.
"So within the LDP there are intense conflicts within different factions - they all want their own faction to get the leadership position."
"So even though you could be chosen as leader, as soon as you're in power, you have dozens of people manoeuvring to try to get you out again."
Key Factors Behind Rapid Turnover
- Single-party rule restricts external competition
- Party infighting fuel leadership contests
- The prime minister's position is frequently called a "cursed position"
- Government continuity remains elusive despite financial power
