back number is developed by Fanplus, Inc. and available on the App Store. It has reached #10 on the Japan Top Free chart. It is currently in the top 50 in Japan.
Chart History
Rank over the last 24 days
Currently in Top 50
| Market | Store | Tab | Category | List | Rank |
|---|---|---|---|---|---|
| JP | App Store | apps | music | free | #41 |
Best Rankings
| Market | Category | List | Best Rank | Date |
|---|---|---|---|---|
| JP | music | free | #10 | 2026-06-29 |