Member ages
KO1KEYZ Member Ages and Birthdays
KO1KEYZ member ages and birthdays ranked oldest to youngest, from Keito at age 25 to Yuki at age 18.
Average20.8years old
Oldest to youngest
| Rank | Member | Age | Birthday | Position |
|---|---|---|---|---|
| #1 | KeitoMember | 25 | Jul 25, 2000 | Member |
| #2 |  SiyoungMember | 23 | May 6, 2003 | Member |
| #3 |  ShinhaengMember | 22 | May 3, 2004 | Member |
| #4 |  YoshikiMember | 22 | Jun 18, 2004 | Member |
| #5 |  DaikiMember | 21 | Oct 8, 2004 | Member |
| #6 |  RyogaMember | 21 | Jan 21, 2005 | Member |
| #7 |  IssaMember | 21 | Mar 10, 2005 | Member |
| #8 |  YuraMember | 21 | Jun 16, 2005 | Member |
| #9 |  RyujiMember | 19 | Jul 7, 2006 | Member |
| #10 |  TowaMember | 19 | Jun 5, 2007 | Member |
| #11 |  KosukeMember | 18 | Dec 2, 2007 | Member |
| #12 | YukiMember | 18 | Dec 24, 2007 | Maknae |