Japan will kick off the "Warm Biz" campaign Oct. 1, an autumn-winter version of the "Cool Biz" campaign held this summer, to promote energy conservation by encouraging business people to wear extra layers of clothing and help reduce the use of heaters, the Environment Ministry announced Monday.

Under the campaign, office workers will be encouraged to wear knitwear, warm underwear and head wear so they can work comfortably in an office with a temperature of 20 degrees, the ministry said.

The ministry will create a campaign logo and allow stores that sell such items to use it.

"Cool Biz was introduced successfully as the campaign helped increase department store sales and stimulated the economy," Environment Minister Yuriko Koike said.

"Just as much electricity is used during winter for heating as in summer for air conditioning," she said. "We want to promote a fashion which is warm and easy to work in so that we don't have to depend too much on heaters."