I agree, by the pattern this Hachina guy is having, next time he'll lose all his memory un till the day he was born, making him a terminal Alzheimer's patient. Which is kind of funny, as terrible as this illness is...so it HAS to increase in stretches and frequency each time? I can fathom it as a mere rule set-up by a story, but even if you start to amp up amnesia like this, it seems kinda crazy to force that part of it.
Great stuff though. Appreciate the explanation.