以上 (ijō) and 以下 (ika) are two of the most important words for understanding rules, signs, and specifications in Japanese. Whether you are reading a restaurant reservation policy (“must be 3 or more people”), a drinking age law, or a weight restriction at the airport, these two words appear constantly. The good news: the difference is simple once you understand one key rule. This guide walks you through everything with clear examples and a memorable framework.
YukaHey Rei, what’s the best way to remember the difference between 以上 and 以下?
ReiThe best trick is to associate each word with a strong image or situation. By the end of this article you’ll have one for each — promise!
At a Glance: 以上 vs. 以下
| Feature | 以上 (ijō) | 以下 (ika) |
|---|---|---|
| Core meaning | A or more / At least A / A and above | A or less / Up to A / A and below |
| Does it include A? | YES — A is included | YES — A is included |
| Kanji | 以上 | 以下 |
| Direction | Upward (more, higher, greater) | Downward (less, lower, fewer) |
| Math equivalent | ≥ (greater than or equal to) | ≤ (less than or equal to) |
| Common contexts | Minimum requirements, eligibility thresholds | Maximum limits, caps, safety rules |
| JLPT level | N3 | N3 |
以上 (ijō) — A or More (Going Up)
以上 means “A or more” — the boundary number is included, and everything above it qualifies. Think of it as setting a minimum threshold. If you see 18歳以上, that means 18-year-olds are included along with anyone older. The 以 kanji means “from this point,” and 上 means “above” — so 以上 literally points upward from the boundary.
Common real-world uses: drinking age (20歳以上), minimum group size for reservations (3人以上), experience requirements (1年以上の経験).
Example 1 — drinking age:
日本では、二十歳以上じゃないとお酒は飲めないよ。
Nihon dewa, hatachi ijō ja nai to osake wa nomenai yo.
In Japan, you cannot drink alcohol unless you are 20 or older.
Example 2 — reservation minimum:
3人以上いないと、このレストランは予約ができないみたいね。
San-nin ijō inai to, kono resutoran wa yoyaku ga dekinai mitai ne.
It seems you need at least 3 people to make a reservation at this restaurant.
Example 3 — driving age:
日本では18歳以上にならないと車の運転ができないんだ。
Nihon dewa jūhassai ijō ni naranai to kuruma no unten ga dekinai nda.
In Japan, you cannot drive a car until you are 18 or older.
YukaThat makes sense! So 以上 is about… okay, I think I’m starting to get it.
ReiYou’re getting it! And the more you practice using 以上 in sentences, the more automatic it becomes. Language learning is all about repetition.
以下 (ika) — A or Less (Going Down)
以下 means “A or less” — again, the boundary number is included, and everything below it qualifies. Think of it as setting a maximum cap. If a rule says 7キロ以下, then 7kg exactly is allowed, as is anything lighter. The 以 kanji means “from this point,” and 下 means “below” — so 以下 points downward from the boundary.
Common real-world uses: speed limits (60km/h以下), luggage weight limits (7kg以下), age maximums for discounts.
Example 1 — children’s discount:
3歳以下の子供は無料だよ。
San-sai ika no kodomo wa muryō da yo.
Children 3 years old and under are free. (3-year-olds are included)
Example 2 — luggage:
持ち込みの手荷物は7キロ以下じゃないとダメだよ。
Mochikomi no tenimotsu wa nana kiro ika ja nai to dame da yo.
Carry-on luggage must be 7 kilos or less. (exactly 7kg is OK)
Example 3 — item limit:
3つ以下しか買えないのか。
Mittsu ika shika kaenai no ka.
We can only buy up to 3? (buying exactly 3 is allowed)
YukaAlright. And now explain 以下? I want to make sure I have both down.
ReiSure! 以下 is actually the easier one to remember once you have a clear mental image. Let’s look at the examples.
The Key Difference: Direction, Not Inclusion
Here is the important insight: both 以上 and 以下 include the boundary number. The difference between them is direction — one goes up, the other goes down. This is different from 未満 (miman = strictly less than, boundary excluded) and 超える (koeru = strictly more than, boundary excluded).
| Word | Direction | Includes boundary? | Math | Example (N = 5) |
|---|---|---|---|---|
| 以上 (ijō) | Upward | YES | ≥ | 5以上 = 5, 6, 7, 8… |
| 以下 (ika) | Downward | YES | ≤ | 5以下 = 5, 4, 3, 2, 1… |
| 超える (koeru) | Upward | NO | > | 5を超える = 6, 7, 8… |
| 未満 (miman) | Downward | NO | < | 5未満 = 4, 3, 2, 1… |
Decision Flowchart: 以上 or 以下?
Setting a rule or limit involving a number?
|
v
Is the rule a MINIMUM (at least X, X or more)?
| |
YES NO → Is it a MAXIMUM (at most X, X or less)?
| |
v YES
以上 |
(A or more, ≥) v
以下
(A or less, ≤)
Note: Both 以上 and 以下 INCLUDE the boundary number.Quick Quiz — Test Yourself!
YukaOkay Rei, quiz time! I want to test how well I’ve absorbed all this.
ReiChallenge accepted on your behalf! Let’s see how much of 以上 and 以下 has sunk in.
Choose 以上 or 以下 for each situation.
Q1. “You must be 18 or older to vote in Japan.”
日本では18歳＿＿＿でないと投票できません。
Answer: 以上 — This sets a minimum age (18 and above). 18歳以上. An 18-year-old is included.
Q2. “Products weighing 500g or less qualify for the discount.”
500g＿＿＿の商品は割引対象です。
Answer: 以下 — This is a maximum weight cap. 500g以下. Exactly 500g qualifies.
Q3. “To receive the bonus, you must earn ¥30,000 or more this month.”
今月3万円＿＿＿稼ぐとボーナスがもらえます。
Answer: 以上 — A minimum earning threshold. 3万円以上. Earning exactly ¥30,000 qualifies.
Q4. “Children aged 12 and under can use this playground.”
12歳＿＿＿の子供がこの遊び場を使えます。
Answer: 以下 — Maximum age limit. 12歳以下. A 12-year-old is included.
Q5. “We need 5 or more participants for the event to happen.”
イベントには参加者が5人＿＿＿必要です。
Answer: 以上 — Minimum requirement. 5人以上. Exactly 5 people counts.
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あわせて読みたい
Want to complete the set? Learn the difference between 未満 (miman — strictly under) and 以下 (ika — up to and including):
Practice your number vocabulary with our complete guide to counting in Japanese:
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