Representatives of the nation's media organizations said on Tuesday that they would maintain a ban on newspaper discounts to preserve the home delivery system.
The declaration was adopted in the annual National Newspaper Convention, which was attended by about 540 people from newspapers, wire services and broadcasters.
Under an exception to the Antimonopoly Law, the retail prices that publishers set for newspapers may not be changed by the vendors.
In his opening speech, Tsuneo Watanabe, president of the vernacular Yomiuri Shimbun and chairman of the Japan Newspaper Publishers and Editors Association, stressed the role newspapers play in a society where information technology is rapidly advancing.
The speech was followed by ceremonies honoring recipients of this year's association prizes for outstanding performance.
The convention also adopted a resolution opposing any move that threatens the freedom of expression.