Overview
ONLY ONCE, ONLY 7TH. was the sixth live by the IDOLiSH7 franchise, held at the Yoyogi National Gymnasium. It was a celebration of the franchise's seventh anniversary and it marked a special milestone as the number "7" is very a significant number within IDOLiSH7. The theme was "parade".
| Actor | Age then | Age now | |
|---|---|---|---|
 | 33 | 35 | |
 | 37 | 39 | |
 | 39 | 41 | |
 | 41 | 43 | |
 | 42 | 44 | |
 | 35 | 38 | |
 | 33 | 35 | |
 | 41 | 43 | |
 | 32 | 34 | |
 | 38 | 41 |