Looking back Ichiryuu seems to be extremely overpowered to begin with. Every strong characters we've seen on this series all have gourmet demons to help them grow or at least they could strengthen themselves by eating delicious food wantonly. However, this flashback shown that Ichiryuu despite having the cells never used it at all and managed to become the strongest person without eating delicious feast all the time. Imagine how strong he'll actually become if he is a bit greedy.
