Abe's conservative Liberal Democratic Party (LDP) and its junior coalition partner Komeito are likely to win around 300 of 465 seats in the October 22 election, according to polls by Kyodo News and the Nikkei business daily.
Mass-circulation Yomiuri Shimbun said the LDP could secure a stable majority on its own, without needing its coalition partner.
A two-thirds majority in parliament would allow Abe to push through an amendment to Japan's pacifist constitution.
Support for Koike's newly founded Party of Hope, which has transformed Japan's political landscape and swallowed up the main opposition Democratic Party (DP), appears to be deflating, with surveys predicting it might win around 60 seats.
A new centre-left grouping of DP members that did not jump on the Tokyo governor's bandwagon could clinch 40 seats, according to the Yomiuri survey.
After an initial surge of support for Koike, critics say the Tokyo governor has suffered by not running herself in the election, meaning voters for her party are not sure who they are electing as PM.
The 12-day election campaign, which kicked off the day before yesterday, will focus on reviving Japan's once world- beating economy and tackling the ever-present threat of North Korea, which has threatened to "sink" the country into the sea.
Abe is seeking a fresh term at the helm of the Asian economic powerhouse and key US ally and unexpectedly called a snap election to capitalise on a weak and fractured opposition.
But the media-savvy Koike stole his limelight by launching her party, attacking Abe's government for being too slow to reform the country, which is weighed down by an ageing population, deflation and a huge debt mountain.
Critics say Abe called the early election to divert attention from a string of scandals, including allegations of favouritism to a friend in a business deal -- which the Premier strongly denies.
Before the campaign kicked off earlier this week, Abe's ruling bloc held a two-thirds majority, with his long-ruling LDP holding 287 seats and Komeito with 35.
Abe has said he would step down if his coalition fails to win a simple majority.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
