How Rankings Work

Three Rankings

Time Window: Why 14 days?

The Overall ranking only includes tracks posted in the last 14 days. Seven days leaves too few tracks, and 30+ days makes the lineup stale, so 14 days balances freshness and enough tracks.

The Yearly Ranking (365 days), on the other hand, serves as a hall of fame — rescuing great tracks that got buried in the weekly churn.

The ranking score is the track page score

The AI score used for the Overall and Yearly rankings is the same AI score shown on the track page: the average (0–100) of the judges who reviewed that track. The rankings never use a separate number.

One exception: <b>KUREHA's score is shown for reference only</b> and counts toward neither the AI score nor the ranking. KUREHA is a harsh judge who mostly reviews Premium tracks, so counting her would lower Premium tracks only (the retired R.D.J is treated the same way). Her review and score are still on the track page. If you prefer harsher critique, check out the S3 Specialist ranking.

Evaluation axes

The 4 free judges

• Dr. Takano Seiichi — structure, theory, completeness
• KENJI — groove, physicality, danceability
• Tanaka Yoshio — melody, emotion, memorability
• Rina — trend sensitivity, relatability, shareability

S3 Specialist Judges (all with Premium)

• KUREHA — sound density · layering · avant-garde
• Mika Omae — worldbuilding · character · vocaloid / anisong fit
• Mimi — improvisation · space · the beauty of 'ma'
• MASK — energy · destruction · emotional explosion / AOI RAIN — groove · night air · vocal emotion

Score Formulas

Weekly Ranking

The average of the individual 0–100 scores from the judges who reviewed the track (KUREHA and guest judges are not counted).

Yearly Ranking

AI and human scores combined. Sorted by "tracks everyone agrees are great."

S3 Specialist Ranking

Uses the average of whichever of the 5 S3 specialists reviewed the track. Only Season 3 tracks reviewed by at least 3 of them are listed.

How Divergence Tags Are Calculated

Tags like 🤖 AI Praised, 👤 Human Wins, ⭐ Unanimous, and 💀 Divisive on the track detail page are determined by comparing AI score vs. human score.

• 🤖 AI Praised: AI score > human score + 20 pts
• 👤 Human Wins: human score > AI score + 20 pts
• ⭐ Unanimous: both scores 80+
• 💀 Divisive: both scores 40 or below

The AI side uses the same AI score shown on the track page and in the rankings.

AI Score Display on Track Pages

The "AI Judges' Score" on track detail pages shows the average (0–100) of each judge's individual 0–100 score.

• The number of judges varies per track (4 free / up to 9 with Premium, and you can choose fewer)
• Using an average (not a sum) keeps every track on the same 0–100 scale regardless of judge count
• The "N judges" label next to the score shows how many judges rated that track

This displayed value is consistent with the sort key used in the rankings (0–100 average).

FAQ

Q. My track disappeared from the ranking.

After 14 days, tracks drop off the Weekly ranking. The Yearly Ranking (365 days) and the S3 Specialist ranking have no such window, so a track may still appear there.

Q. My displayed score dropped when more judges reviewed it

The displayed score is the average of the judges who reviewed the track. A stricter judge can lower that average, and the Overall ranking uses the same score. KUREHA's score is for reference only and counts toward neither.

Q. How often is the ranking updated?

Rankings update in real time. New scores and new tracks are reflected the moment they come in.

Q. How is the human score calculated?

The average of user star ratings (1–5) is multiplied by 20 to map it to a 0–100 scale.