This article investigates differences in structural tendencies between Japanese newspaper editorials and front-page columns. Although intuitively recognized by Japanese people, such differences have tended to be empirically overlooked in discourse or rhetoric research. This study compares the two text types, specifically focusing on the location of the main topic (or ‘the highest topic’) in the text item rather than the main thesis, the former of which has received less empirical attention than the latter in Japanese discourse research. The study analyzed 30 editorials and 30 front-page columns from three major Japanese newspapers. The results show that the editorials have an early placement pattern, whereas the columns tend to have delayed introductions. These differences were statistically significant, empirically demonstrating how the intuitively recognized structural tendencies between the two text types crucially differ. The finding that there is a systematic early placement of the main topic in Japanese editorials is indicative of a basic common feature among languages in the editorial genre. From a methodological perspective, the study demonstrates the validity of the index of the main topic location as an analytical tool to distinguish different textual structures.