場合はbaai wa“if; in that situation”

場合は (baai wa) means “if,” “in case of,” or “in the event that.” It is a JLPT N4 pattern for setting up a specific situation and then saying what happens, or what someone should do, in that situation: 雨の場合は、試合はありません — “If it rains, there is no game.”

場合 is a noun meaning “case” or “situation,” so the pattern is literally “in the case of rain, …”. That noun origin gives it a slightly formal, rule-like sound. You see it on signs, in manuals, in school handouts, and whenever a teacher or a shop explains what to do if something goes wrong.

場合は sets up one possible case out of several, then gives the rule for that case — the grammar of instructions and contingency plans.

What does 場合は mean?

The pattern is situation + 場合は、what happens / what to do. The first half names a case that may or may not occur; the second half gives the consequence.

• 遅れる場合は、電話してください。 — If you’re going to be late, please call.
• 雨の場合は、中止です。 — In case of rain, it’s cancelled.

Two things make 場合は different from a plain “if.” First, it implies there are other cases too: when it doesn’t rain, the game goes ahead. 場合は picks out one branch. Second, it is usually hypothetical and forward-looking. You use it to prepare for something that might happen, not to describe a single event you already know about.

The は is the topic marker. It singles out this case as the one you’re talking about. You will also see 場合 with other particles (場合も “also in the case of”, 場合には, 場合によって “depending on the case”), but 場合は is the most common shape at N4.

How to form 場合は

Because 場合 is a noun, it attaches exactly like any noun that is modified by a clause. Verbs and い-adjectives connect in their plain form; な-adjectives keep な; nouns take の.

The tense before 場合 matters. The dictionary form points to something before it happens (遅れる場合は — if you are going to be late, call beforehand). The た-form points to a situation that has already come about (遅れた場合は — if you ended up being late, e.g. report it afterwards). Keep in mind that neither of these is past tense in English; both are hypothetical.

When is 場合は used?

• Instructions and rules: school notices, manuals, apartment rules, emergency signs. 火事の場合は、エレベーターを使わないでください.
• Customer service: ご不明な点がある場合は… (“if you have any questions…”) in emails and on websites.
• Planning with others: 雨の場合は、どうしますか — “What do we do if it rains?”
• Explaining exceptions: 学生の場合は、半額です — “For students, it’s half price.”

In relaxed conversation between friends, 場合は can sound stiff. You would more naturally say 雨だったら、どうする？ with たら. The more a sentence reads like a rule for anyone in that situation, the better 場合は fits.

場合は example sentences

Most of these end in 〜てください, 〜ないでください, or a statement of policy. That pairing — case, then instruction — is the typical shape of a 場合は sentence.

Nuance of 場合は

場合は treats the situation as one entry in a list of possibilities. When a sign says 雨の場合は中止, the unspoken other entry is “if it doesn’t rain, it goes ahead.” That is why 場合は is so common in rules and FAQs: it lets the writer cover each case in turn.

It also carries a note of distance. Using 場合は about something that is definitely going to happen sounds odd, because you are treating a certainty as a contingency. If you know you will go to Kyoto next week, say 京都に行くとき, not 京都に行く場合は. If you are explaining what travellers should do if they go to Kyoto, 場合は is fine.

💡 Not for one-off past events: 場合は does not narrate what happened. “When I went to Kyoto, it rained” is 京都に行ったとき、雨が降りました — never 行った場合は.

Finally, because the second half is usually an instruction or a fixed consequence, 場合は rarely combines with strong personal emotion. 雨の場合は悲しい (“in the event of rain, I’m sad”) sounds like a policy statement about your feelings. Use たら for that: 雨だったら悲しいな.

場合は vs とき

Both translate as “when/if,” and both attach to the same noun-modifying forms. The difference is certainty and scope.

A quick test: if you can say “in the event that” in English without it sounding silly, 場合は works. If the sentence is about a moment in time you know will come, or one that already passed, use とき.

Common mistakes with 場合は

Is 場合は on the JLPT?

In reading questions, a notice often has two or three 場合は clauses in a row — for example one for adults and one for children, or one for cancelling by phone and one online. The question then describes a person and asks what they must do. Find the case that matches the person before you look at anything else.

Practice questions for 場合は

Learning path for 場合は

Related grammar to review next

• とき — the time-based “when,” needed for real and past events where 場合は doesn’t fit.
• たら — the casual, all-purpose “if” you use when 場合は would sound too formal.
• なら — another way to single out one case, used in reply to what someone just said.
• と — the “whenever X, Y always happens” conditional, often used in manuals alongside 場合は.

Learn 場合は with Hane

Hane puts 場合は next to とき and たら in short drills, so you learn which one a notice, an email, or a conversation calls for. Practise N4 conditionals in Hane.