Kishida enjoys reasonable public support about a week into the job, polls show, boding well for his goal of maintaining a lower house majority for his Liberal Democratic Party (LDP) and its Komeito coalition partner.

Voters will want to see a government with plans for decisive action to end the pandemic and rebuild the economy.

A recent Sankei newspaper poll showed that about 48 per cent of voters say they want the Kishida administration to work on coronavirus most, followed by economic recovery and employment.

Kishida's party is promoting his push for coronavirus measures including supplying oral antiviral medication this year, as well as his vision of realising a "new capitalism" that focuses on economic growth and redistribution of wealth.

The ruling party has also called for a sharp increase in defence spending to acquire the capability to destroy ballistic missiles, amid China's increasingly assertive posture over Taiwan.

The largest opposition party , the Constitutional Democrats (CDPJ), led by Yukio Edano, has highlighted issues such as its support for same-sex marriage and different surnames for couples.

The LDP remains socially conservative and Kishida has said he is not in favour of same-sex marriage.

The biggest challenge for Constitutional Democrats is their low support ratings.

A recent poll by the Asahi Shimbun newspaper found only 13 per cent of people were planning to vote for them, far behind the LDP's 47 per cent.

Most other polls record CDPJ support in single figures.

Canvassing in many districts is already underway but formally the campaign will kick off on October 19, followed by the vote on October 31.

Australian Associated Press