The nation set to choose woman prime minister in landmark first
Over the last two decades, the country has had more than 10 leaders.
Actually, one expert likens taking up the nation's top job to taking a "cursed cup".
However, what is the reason does Japan frequently replace prime ministers? This is partly because of it being a "single-party system", explains Prof James Brown of Temple University Japan.
The LDP's grip on the political landscape means the main political competition originates within the party, instead of from opposition groups.
"So within the LDP there are vicious struggles within various groups - they all want their own faction to secure the top job."
"Thus although you could be chosen as leader, the moment you're in power, you have many individuals scheming to try to remove you again."
Main Reasons Behind Rapid Turnover
- Single-party rule restricts outside challenges
- Internal factional rivalries fuel leadership contests
- The prime minister's position is frequently called a "poisoned chalice"
- Government continuity stays elusive despite economic strength
