The nation set to elect woman prime minister in landmark first
Over the last two decades, the country has had more than 10 prime ministers.
Actually, one expert compares assuming the nation's highest office to taking a "poisoned chalice".
But why does Japan keep changing prime ministers? This is partly because of it being a "one-party democracy", says Prof James Brown of Temple University Japan.
The LDP's grip on the country's politics means the main political competition originates within the party, rather than from opposition groups.
"So within the LDP there are vicious struggles within various groups - they all want their own clique to get the top job."
"So even though you might be chosen as prime minister, the moment you're in office, you have many individuals manoeuvring to try to remove you again."
Key Factors Behind Frequent Changes
- One-party dominance restricts external competition
- Party infighting fuel leadership contests
- The prime minister's position is frequently called a "poisoned chalice"
- Political stability remains elusive despite economic strength
