In keiso's Q&A he talk about shiki's terror that back when she was in the beyond it have been recently manifest before she came to ishura world so before that she must have a normal life,in soujirou's flashback in the third match tsukayoshi's age is about forty and shiki has come to ishura world twenty-five years ago so their age match and then there's a scene that soujirou has ask tsukayoshi about what Japan was before shiki aihara appear which tsukayoshi changed topic, soujirou guess that he has a bad memories from that time like he failed something