Thread:IRosefeather/@comment-35109290-20180712023610

The ages have been confirmed by Japanese fan Zushilove here and known by other fans for months now:

https://zushilove.tumblr.com/post/171152534997/ https://zushilove.tumblr.com/post/171188124772/ https://zushilove.tumblr.com/post/171297549597/ https://zushilove.tumblr.com/post/168045879377/

Considering Kagerou Project uses a Japanese school system they should really be noted. https://www.tokyo-icc.jp/guide_eng/educ/01.html

At the least, Momo's conflicting age is definitely noted to be 15 in her (official) Japanese Pixiv Profile: https://dic.pixiv.net/a/如月モモ

The Children Record booklet also does not, in fact, list any exact ages, as you can see here: http://mitsukouchiha.tumblr.com/post/29351776578/

Only Shintaro's is listed (18 exact). The others were previously assumed based on Shintaros, but errors occured as people didn't properly place their ages using the Japanese school system. 