The conception of sea-highway or tol-laut has received a profound attention from the government as reflected in the National Medium Term Development Plan (RPJMN) 2015-2019. In addition to 25 strategic ports all over the country, five hub ports are being determined: Belawan, Tanjung Priok, Tanjung Perak, Makasar and Bitung, navigated regularly by large freight vessels, from the west to the east and vice versa. Unloaded cargo at the hub ports are then delivered to feeder ports that spread throughout the country. Container throughput is heavily concentrated in the ports of Java such as Tanjung Priok of Jakarta and Tanjung Perak of Surabaya. Although the implementation of sea-highway has not yet been implemented effectively, the changes in the concentration of port throughput   needs to be observed whether there have been a dynamic change in the role the ports. Using Gini Index, the objective of this paper is to explore the changes in the concentration of domestic loading and unloading of cargo in strategic ports over the country, 2005-2015, and the application of spatial Gini model to analyze the concentration of container throughput in the hub ports.