市场消息：意大利、英国防务公司高管表示，与日本合作开发的下一代战斗机进展符合预期。

Group 1 - The core viewpoint of the article is that the development of the next-generation fighter jet in collaboration with Japan is progressing as expected according to executives from Italian and British defense companies [1] Group 2 - The collaboration between the Italian and British defense sectors with Japan is aimed at enhancing technological capabilities in military aviation [1] - Executives highlighted that the project is on track, indicating a positive outlook for future developments in defense technology [1]