The translation of the given 'Bahasa' text to 'English' while preserving any HTML tags is as follows: "Research analysis focused on 19 skulls that have undergone reshaping and were found in a coastal burial site dating back to the Hirota tribe period. The purpose of this study is to definitively prove that the changes in skull shape are the result of human actions, rather than simply being a side effect of rituals or other practices."

In the research process, scientists use two-dimensional images to analyze the external shape of the skull in detail. They also perform three-dimensional scanning of the skull's surface to create a model that closely approximates its original shape. In addition, they compare the Hirota tribe's skull with other indigenous groups, such as the Yayoi and Jomon tribes, who lived during the same period but in different locations.

Although the exact purpose of this skull modification is still not fully understood, researchers present interesting hypotheses. They connect this practice with the identity of the Hirota tribe group and the possibility of long-distance trading networks.