The remarks by Defence Minister Tomomi Inada came as fears grow over North Korea, which is believed to be on the verge of a sixth nuclear test and has threatened to launch missile tests "every week".
But her statement in parliament reported by Jiji Press and public broadcaster NHK is likely to be controversial in South Korea.
There memories of Japan's brutal colonial occupation from 1910-1945 have hindered relations and the possibility of Japanese troops on its soil would likely cause anger.
Inada said such a dispatch of troops is allowed under Japanese law, which also requires the consent of the related country.
Japan's constitution renounces the right to wage war and the country's military is limited to self defence in the strictest sense.
Prime Minister Shinzo Abe, however, is pushing to expand the military's role and legislation was passed in 2015 that could see troops engage in overseas combat for the first time since the end of World War II.
Pence met Abe on Tuesday, reiterating Washington's commitment to their decades-old alliance.
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
