The nation on course to elect female prime minister in landmark first
Over the last two decades, Japan has seen more than 10 prime ministers.
Actually, a specialist compares taking up the nation's top job to drinking from a "poisoned chalice".
But why does Japan frequently replace prime ministers? This is partly because of it being a "one-party democracy", says Prof James Brown of Temple University Japan.
The Liberal Democratic Party's control on the country's politics means the main political competition originates within the party, instead of from opposition groups.
"So within the LDP there are vicious struggles within different factions - they all desire their own clique to secure the leadership position."
"So even though you might be selected as leader, as soon as you're in power, you have many individuals manoeuvring to try to get you out again."
Main Reasons Behind Rapid Turnover
- One-party dominance limits external competition
- Party infighting drive power struggles
- The prime minister's position is often described as a "poisoned chalice"
- Political stability stays elusive despite economic strength
