However, as age caught up to him, Akio started to lose agility
Akio started suffering from unbearable aches, joints and muscle pain especially on his knees, where he suffered greatly.
He then struggled to keep up with his ninjutsu training, eventually losing confidence in himself and his abilities.
Akio was forced to rest for most of the days and only manage to train up to an hour everyday as it was causing the pain.
This prompted Akio to have no choice but to find a remedy for his pain as soon as possible.