Thanks for the chapter, YZ.
He is master level in combat, not in mentality.
This arc, he should hopefully mature.
Well, Kenichi's not a master yet, but I know what you mean: still, I say that this is debatable.
There is this convention in Japanese writing that holds that a pure defense or a focus thereon is viable in combat; this is best exemplified by those knights you can see in various fantasy-setting manga (isekai or not) that bear nothing but a shield. It doesn't take a lot of thinking to realize how ludicrous this is: unless the tank is invincible or the shield is indestructible, that defense will eventually fail. The messaging beneath is likely that passivity can still take a win. Another example: one guy says, "I'll beat you!" while MC-kun facing him says with a smile, "I won't lose either~!"
Defense is not inherently a means of ensuring victory, but a means of preventing defeat--so that you can
actively take victory.
This is a grievous error waiting to happen where Kenichi is concerned: the series already has a technique (though developed by Elder Fuurinji, it's known by one other) that penetrates defense--Kazoe Nukite. It's probably not the only one with its effect, but it's just one of the ways Kenichi's "tank-everything-until-my-emotions-make-me-get-serious" MO fails critically: if it's not a blow he can tank that he's receiving but something that would kill him on contact (an explicitly lethal technique or a stab to the right place), then that's it for him. This kind of strategy is not even expert-level, where Kenichi is said to be.
From what i recall, this is his flaw and apparently something they could not fix, just part of his mentality, he is someome that takes a bit to get going, i remember at one point, his masters forced him to train and spar so he went to a duel already hurt and without full stamina...and that was the one time he locked the fuck in instantly, they did it because his opponent was the opposite and locked in right at the start.
I think it was a thing with fighters they talked about, how everyone has a pace to really start fighting and maybe when concentration starts to slip, Kenichi takes longer than most to get going...but i guess by the point he starts fighting the others are starting to slip somewhat too and are not expecting Kenichi to suddenly get better so it works out.
Was that with Ethan Stanley, as Belkin said? That guy was my favorite of the Yomi group. Even though Ethan was as efficient in combat as he was, I don't think it was quite the lesson learned it should have been--after all, Kenichi walked away from it.
What SHOULD have been was the Yan Erawan Kenichi took from Tirawit Kokin. Kenichi took that knee, called "Elephant's Foot", straight to the chest--and it stopped his heart. That's the problem with thinking you can only go to war with a shield and no sword, or that you can finally draw it only when you get
really "serious".