This article is a work in progress. Please expect frequent changes. Help and feedback is much appreciated!
Song Ranking is a brand-new feature that was added to the Arcaea official website on September 1st, 2018. It is a leaderboard showing the most online played paid songs and free ones yesterday.
This page lists the top-ranked songs of each category recorded on the most recent 30 days, starting from September 4th, 2018. The resulting date is the previous day to the date recorded. For the full table of the top 15 songs of each category yesterday, see here.
There is also a line chart showing the placement progress of songs from each category made by EsterTionhere.