法国、英国、德国、意大利、荷兰和日本，发表联合声明

Group 1 - The core viewpoint of the article is that six countries have issued a joint statement to ensure the safety of navigation in the Strait of Hormuz [1][2]. Group 2 - The countries involved in the joint statement include France, the United Kingdom, Germany, Italy, the Netherlands, and Japan [2]. - The announcement was made on March 19, indicating a collaborative approach to address maritime security concerns in the region [2].