I think this is Akira's masterpiece. He gave us the origin story of the greatest character in Otokojuku combined with comedy, violence and so many manly scenes and manly characters.
The structure of the story was also great, giving us some characters connected with the original series which really amazed me.
Overall I really enjoyed the journey of Edajime from his childhood until he grew up and letting us know why he build a school such as otokojuku.
I highly recommend this manga to the fans of otokojuku and especially to the fans of THE PRINCIPLE OF OTOKOJUKU EDAJIMA HIHACHI.