The approval rating of Prime Minister Fumio Kishida's Cabinet rose to 63.2%, its highest level since he took office, a Kyodo News survey showed Tuesday, after his Liberal Democratic Party won a sweeping victory in the House of Councilors election.

The rating in the two-day nationwide telephone survey starting Monday was up 6.3 percentage points from the previous poll in June.

While the LDP and other pro-constitutional revision forces together retained the two-thirds majority in the chamber needed to propose constitutional amendments, 58.4% of respondents said there is no need to hurry to revise the 1947 supreme law, against 37.5% who said the government should hurry.