Grammar Info
N4 Lesson 5: 7/20

以下(いか)
Less than (or equal to), under・(and) below, any less・fewer, not exceeding

Actual Amount ≤ Amount + Counter

Structure
Noun + Amount + 以下
それ(1) + 以下

(1) これあれ
Details
Register Standard
使用域 一般
Information
In order to mark something as ‘equal to, or less than (A)’, 以下(いか) will be used. This is simply a combination of the kanji 以(い) which means ‘by means of’, and 下(か) ‘below’. This expression may also be translated as ‘under (A)’, or ‘fewer than (A)’.
To use 以下(いか), attach it to the amount that you want to highlight as the ‘maximum’ amount.
  • 17歳(さい)以下(いか)方(かた)保護者(ほごしゃ)方(かた)来(き)てください
    For those under the age of 17, please come with a guardian.
  • この車(くるま)30万円(まんえん)以下(いか)だった
    This car was under 300,000 yen.
Similarly to the way that 以上(いじょう) can be used to mark ‘everything up until now’, 以下(いか) can and often is used to highlight ‘everything after now’, ‘the rest’, or ‘the following’.
  • 以下(いか)同文(どうぶん)。
    The rest is the same. (Usually seen in documents to notify the reader that the rest of the document basically repeats what has already been said)
  • 空港(くうこう)以下(いか)もの持(も)って来(き)てください
    Please bring the following to the airport.
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この家(いえ)2000万(まん)円(えん)以下(いか)です
This house costs less than 20 million yen.
[...or equal to]
Play  
日本(にほん)17歳(さい)以下(いか)人(ひと)運転(うんてん)出来(でき)ない
In Japan, those 17 or younger cannot drive.
Play  
80点(てん)以下(いか)ならもう一回(いっかい)テスト受(う)けなくてはいけない
If you get 80 points or less, you have to take the test one more time.
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