Group 1 - The Japan Restoration Party (维新会) is set to join a coalition government with the ruling Liberal Democratic Party (自民党), with a formal agreement expected to be signed on the 20th [1][2] - The coalition will initially operate under an "outside cabinet cooperation" model, meaning that members of the Restoration Party will not hold cabinet positions at first, but may consider joining the cabinet if policy implementation progresses [2] - The Restoration Party has proposed significant political reforms, including a 10% reduction in the number of National Diet members and a ban on corporate and organizational political donations, which may create tensions within the coalition [3] Group 2 - The upcoming prime ministerial election on the 21st is likely to see the Restoration Party support the nomination of Sanae Takaichi, making her the first female prime minister of Japan [1][4] - The current composition of the House of Representatives is crucial, with the Liberal Democratic Party holding 196 seats and the Restoration Party holding 35 seats, requiring a majority of 233 seats for a prime ministerial nomination [4] - There are concerns regarding the governance of Japan, as the new prime minister will face challenges such as addressing rising prices and potential political instability, which could lead to a dissolution of the Diet and new elections [5]