These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Adaptation Displacement: Non-Japanese fans are more familiar with the anime than the manga, which is still ongoing in Japan.
Memetic Mutation: The phrase "Yagi ni denry? hashiru" and many variations on it is a full-blown meme on the Japanese Internet.
More Popular Spin-off: Akagi is a prequel to one of Fukumoto's earlier manga called Ten, in which Akagi dies at the end.
Nightmare Fuel: The Washizu arc, especially to those squeamish about losing blood. Some will probably find the sheer insanity of it all unnerving as well, not to mention Washizu's Demonic Possession moment. The sounds he makes gives a far worse image.
Prequel Displacement: Most Akagi fans don't even know about Ten, where the fifty-three year old Akagi dies at the end.