Factbox: Ex-foreign minister Kishida becomes Japan's ruling party leader. What's next?

He vowed to lead a transformed party in a general election due within weeks and to fight the COVID-19 pandemic.

Here are the next steps and important dates in Japan's political calendar.

* Kishida is virtually assured of replacing Prime Minister Yoshihide Suga in the top job in a parliamentary vote within days, given the LDP's majority in the powerful lower house.

* The new prime minister will have to deal with an economy battered by emergency restrictions aimed at stopping the spread of coronavirus, which is only now starting to slow.

* The new prime minister must also call an election this year.

* Parliament will be called into session on Monday to elect the next prime minister. The candidate who wins the majority of votes cast by the lower and upper houses of parliament will get the job.

* If the two chambers choose different candidates, and negotiations between the two houses fail to agree on one, the lower house decision will prevail. Given the LDP's majority in the lower chamber, the LDP leader will likely be elected prime minister.

* The new premier is also expected to form a new cabinet and reshuffle the LDP executives in early October.

When is the next general election?

* The term of the lower house of parliament runs until Oct.21, meaning a general election will be held this year.

* Prime ministers reserve the right to dissolve the lowerhouse and call a snap election. Snap elections must take placewithin 40 days of the dissolution of the lower house.