Economic structure comparisons between China and Japan have long captivated development economists. To delve deeper into their sectoral differences from 1995 to 2018, we used the annual input-output tables (IOTs) of both nations to construct weighted and directed input-output networks (IONs). This facilitated deeper network analyses. Strength distributions underscored variations in inter-sector economic interactions. Weighted, directed assortativity coefficients encapsulated the homophily among connecting sectors' features. By adjusting emphasis in PageRank centrality, key sectors were identified. Community detection revealed their clustering tendencies among the sectors. As anticipated, the analysis pinpointed manufacturing as China's central sector, while Japan favored services. Yet, at a finer level of the specific sectors, both nations exhibited varied structural evolutions. Contrastingly, sectoral communities in both China and Japan demonstrated commendable stability over the examined duration.

翻译：中日经济结构比较一直吸引着发展经济学家的关注。为深入探究两国1995年至2018年间部门差异，我们利用两国年度投入产出表构建了加权有向投入产出网络。这有助于开展更深层次的网络分析。强度分布揭示了跨部门经济互动的差异。加权有向同配系数体现了连接部门特征间的同质性。通过调整PageRank中心性的权重，我们识别出关键部门。社区检测方法揭示了部门间的聚类倾向。正如预期，分析显示制造业是中国的核心部门，而日本则侧重于服务业。然而，在更具体的部门层面，两国均呈现出不同的结构演化特征。相比之下，在考察期内，中日两国的部门社区均展现出令人瞩目的稳定性。