That's actually not a problem. Ninjas could ran hundred of kilometers during the 4th War after fighting for a long period of time and spending chakra (No chakra = can't run), and while going to Suna, they didn't stop to sleep or eat.
I also thought that we should take some sleep into account, but I was debunked regarding that.
Did they run hundreds of kilometres throughout more than 3 days or were the ninjas in that war simply faster?
Can I see that feat?
And where does it say they didn't sleep or eat during this journey?
But Jvando only reached that value by not assuming they took breaks in the first place. I don't think we can add the breaks to that distance after the fact, can we? We'd have to factor in the breaks initially, but then we run into the issue Jvando pointed out in his blog: there is no indication within that statement, or any other, that they required or took breaks. It'd be an additional unsupported assumption, like he said.
That someone takes breaks / slows down due to stamina when travelling a long distance is the standard assumptions. You need a good argument to claim they don't happen, not to claim that they did.
And yes, we can't simply factor in the breaks after the time. However, it's actually rather easy to figure out what the result with a break every 1000km would be. If we agree to do so I can easily do it.
Although, if breaks are necessary we need to consider stamina when it comes to the "faster than a horse"-speeds.
As M3X also pointed out, we've seen Shinobi travel vast, cross-country, distances in less than a day during the 4th World War, and they didn't stop for food or rest, despite spending hours fighting prior to making the trip. So that's another indication that they don't require much, if any rest, in order to make these extremely long journeys.
If they travel cross-country distances in less than a day, then either those distances are smaller than what the ninjas in this feat are covering in three days, or those ninjas are considerably faster. In neither case, it would make for a good argument for this feat.
Honestly, I was initially in favor of factoring in the breaks, but after going over all the evidence Jvando presented, it just seemed like it'd be an arbitrary assumption in all fairness.
I mean, the quote is relatively specific on it being a thousand miles without rest. Doesn't sound like it indicates it being much more.
Regarding this point, the geographical features next to the Biju Bomb explosions do seem to be identified as
mountains in the manga by Kakashi so I thought it would be okay to treat it as a mountain.
And as I remember we do have a universally accepted lower bound of a mountain on the wiki which is this:
From
this page.
So without a specific figure being given to us, we'd use this as the variable for the mountain's height at a minimum.
609m
is indeed accepted as mountain assumption on the wiki. That said, there is a difference between an acceptable assumption and a good assumption.
609m is the definition used by some dictionary and IIRC based on some countries definition. (I think it's the definition used in the United Kingdom and the Republic of Ireland specifically)
That isn't universally accepted in real-life. For example, the UN Environmental Programme's definition of "mountainous environment" also includes "Elevation of at least 300 m (980 ft), with a 300 m (980 ft) elevation range within 7 km".
As someone born in a very flat area I can say that the things we call mountains around here aren't necessarily mountains by any proper definition either. Everyday use of the term is just even vaguer.
So, I'm not saying the calc with mountain scaling isn't usable at all. However, it's not my ideal on scaling either, so I'm not immediately disregarding other methods.
Although, tbh, travel time based calcs aren't all that great of a method as well. Fiction is just not very consistent with that stuff. Like, how many times did MHS characters need days to travel through japan in fiction?
So currently I absolutely don't have an opinion on what the best-suited method is yet. Maybe I will make up my mind based on what seems like the most realistic result in the end.