This is the 206th most frequent Japanese word.
以下
"Below," "less than," or "the following."
In this sentence, '以下' is used to mean 'the following' when introducing subsequent content.
商品は以下の通りです。
The items are as follows.
Here, '以下' is used as 'below' to indicate a value or quantity lesser than or equal to a reference point.
成績が平均以下の場合、再試験が必要です。
If the grade is below average, a retake is required.
'以下' is utilized here to indicate 'fewer than or equal to' in terms of a numerical quantity.