Member ages
iON! Member Ages and Birthdays
iON! member ages and birthdays ranked oldest to youngest, from Kaguya Kurara at age 21 to Tomari Kuria at age 15.
Oldest to youngest
7 of 10 members have known birthdays.
| Rank | Member | Age | Birthday | Position |
|---|---|---|---|---|
| #1 |  Kaguya KuraraMember | 21 | Jan 7, 2005 | Member |
| #2 |  Nakumo MenmaMember | 20 | Jul 11, 2006 | Member |
| #3 |  Uno YuriMember | 19 | Feb 22, 2007 | Leader |
| #4 |  Osu KanonMember | 19 | Mar 27, 2007 | Member |
| #5 |  Hanamaru PecoMember | 17 | Jun 18, 2009 | Member |
| #6 |  Kurisu MugiMember | 16 | Dec 28, 2009 | Member |
| #7 |  Tomari KuriaMember | 15 | Oct 10, 2010 | Maknae |
Birthday not listed
3 member(s)