Buchio grapples with a concern that all yokai like him eventually face: the fact that his lifespan is much longer than that of humans. His new friend Wagen has been dealing with the same concern in his life with his aging partner, Kazuhiko.
so I think it's fair 
to call this a genetic illness.
.أظنّ أنّه يمكننا وصف هذا بمرض وراثيّ
Man könnte es
als Erbkrankheit bezeichnen.
podría decirse
que es una enfermedad genética.
podría decirse
que es una enfermedad genética.
Cela ressemble un peu
à une maladie génétique.
Penso si possa definire
una malattia genetica.
então pode-se dizer que é
uma doença genética.
Это наследственное заболевание.