Yahoo Japan Corp. will for the first time have a full-screen advertisement for a new product on its Web site from Monday, sources close to the company said Saturday.

Asahi Breweries Ltd. will run the advertisement for its new "happoshu" low-malt beer product on Japan's leading Internet portal until June 30, the sources said.

If a user clicks on the new product banner on the main Web page, the Yahoo Japan logo will change to Asahi Honnama Aqua Blue, the name of the new product, and a full-screen advertisement will pop up, with the background color of the site turning to blue from white, the sources said.

Yahoo Japan hopes to attract more advertisers by taking advantage of its dominant position in the industry, the sources said. The portal receives about 500 million hits a day.

Aqua Blue, the third happoshu product from Asahi Breweries, will go on sale July 16 at 145 yen for a 350-ml can. It has a reduced sugar level and the brew includes deep-sea water and extracts of seaweed, the company said, adding that it hopes more than 1 million Web users will see the advertisement during the campaign.