日本众院选举投票意向：自民党占比40%

Group 1 - The core viewpoint of the article indicates that the Liberal Democratic Party (LDP) maintains a support rate of 40%, unchanged from the previous survey before the last House of Representatives election under Ishiba Shigeru's administration [2] - The newly formed party "Center Reform Union" has a support rate of 13%, while the Democratic Party for the People stands at 9%, and both the Constitutional Democratic Party and the Japan Innovation Party have 7% each [2] - The support rate for the "Center Reform Union" has decreased by 6 percentage points compared to the combined support rate of the Constitutional Democratic Party and Komeito from the last survey [4] Group 2 - Among voters aged 18-39, the Democratic Party for the People has a support rate of 18%, and the Japan Innovation Party has 11%, indicating stronger support from the younger generation [6] - In the 60 and above age group, the "Center Reform Union" has a relatively high support rate of 22%, making the elderly demographic its main support base [6] - A significant 67% of respondents prefer a government centered around the LDP and the Japan Innovation Party, surpassing the 19% who favor a government centered around the "Center Reform Union" [6]