the early born

[Itasan]

The school year in Japan starts in April.
Those who are born between January 1 and
April 1 (inclusive) start school one year
before the rest of the people born in the
same year.

This is short information for you. Also
may I ask if the above sentences are correct?
Itasan

[Barbara Murphy]

You don't need to put "(inclusive)" anymore, since you already specified that they have to born between those dates. Other than that, yes, the sentences are correct.