noun, noun which may take the genitive case particle 'no'
born after April 1; late-born (school year)
In Japan, the school year starts in April. Children born after April 1 enter school a year later than those born before that date. This term is often contrasted with 早生まれ (born before April 1).
See also: 早生まれ
彼は遅生まれなので、同じ学年の友達より少し年上だ。
He was born after April 1, so he is a little older than his friends in the same grade.
遅生
Children born after April 1 are often physically bigger than those born before April 1.