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.
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 |