According to the JAL ABC Japanese-language website,
in NRT Terminal 2 Arrival Lobby,
JAL ABC luggage storage counter is open
from 7:00 until 1 hour after the last Terminal 2 arrival (A).
As long as your entry procedure goes smoothly,
you are likely to get to this counter during the hours.
Please note that you,
only at the same counter, can pick up your luggage.
The JAL ABC English-language webpage,
though it says nothing about the arrival counters,
shows the details of the storage service.
Just to add,
there are items which you cannot store there.
They include cash, valuables, animals and perishable things.
- JAL ABC
: Luggage storage counters in NRT Terminal 2 ((Japanese))
https://www.jalabc.com/airport_counter/narita-airport_terminal2.html#a...: Luggage Storage Service ((English))
https://www.jalabc.com/en/hands-freetravel/baggage-storage.htmlOn the NRT website,
currently the office hours are written as 7:00 to last flight (B);
on the JAL ABC Japanese website,
description resembling (B) is rewritten as (A).
So, (A) seems more up-to-date.