The 12 countries involved in the Trans-Pacific Partnership negotiations are unlikely to ease their individual food safety standards as the subject is not being discussed in the free-trade talks, negotiation sources said Wednesday.

While this means Japan can maintain its regulations on food additives and pesticides that are stricter than international standards, easing of such rules could still be dealt with in upcoming rounds of Japan-U.S. bilateral talks to be held in parallel with the TPP negotiations, as Washington has called for simpler regulations.

Some Japanese consumer groups have expressed concern that the TPP could undermine domestic food safety.