Luggage question

Good afternoon,

so here's my question...

Day 1 at 5 PM store the lugagge in Kyoto or Osaka Station lockers.
Day 2 traveling
Day 3 travel again
Day 4 at early morning pick up the lugagge from the lockers.

It is less than 72 hours but do you think is this allowed? or they will pick up the lugagge and take it ou? If yes, any recomendation to store lugagge more than 3 days, not planning to send by TQBIN because I am doing Kumano Kodo and is super unconvenient.

Thanks

One thing you may not be aware of is that luggage forwarders like Yamato can hold your bags as well as send them somewhere. I've used them several times when I could not find any locker available (and at some popular places, after mid-morning they may not be).
There are other options too.
https://cloak.ecbo.io/en

Day ends at midnight. The example given is four days.

Days for the use of lockers are counted before dawn,
for example, at 2 a.m.;
if you are supposed to vacate the locker within 3 days,
your luggage might be collected by the managing company's staff,
on your Day 4 just before you come to pick it up,
because 3 days have passed concerning your use.
Anyway, you should pay the fee for 4 days.

Luggage storage service
at Kyōto Station | Shin-Ōsaka Station | Ōsaka Station
: It's open from 8:00 to 20:00, every day.
: Your luggage can be stored for up to 15days.
: The fee is 800 yen per item per day.

- Crosta Kyoto: Temporary luggage storage
https://kyoto.handsfree-japan.com/en/service/baggage-room/