20th Century Boys - Vol. 14 Ch. 149 - Intruder

[MangaDex]

 

[Cosmak]

So the old man's coming from this town too...

 

[eirianrobotto]

what is Kami eating though that's making him live so long?

 

[Salmonskin]

what is Kami eating though that's making him live so long?

The kids were born in 1960 so they should be 55 yo in 2015. Kami is a successful businessman, so let's say he's 30-40 in 1971. That means in 2015 he's around 70-80. He's old but still reasonable, right around Japan's life expectancy.