Observed arrival · 2026-10-10
Idol SONAR puts Japan’s underground idol scene on the radar
A Japanese-language discovery database for underground idols, with group and member listings, debut events, live appearances, music videos, and rankings.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Fans discovering Japan’s underground idol scene
- Worth noticing
- A live-event panel names 20 members and venues, while debut listings label first shows as SONAR-detected.
Field notes
The page breaks discovery into distinct routes, including group search, debut listings, music videos, and rankings, with additional browsing by genre and region. Its live-appearance ranking covers the preceding 30 days, and a “new star” section focuses on groups described as one to two years old. The homepage displays substantial catalog counts, but the extraction does not describe how entries are sourced or ranked.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue