Japanese Conditionals: tara, nara, ba and to

🗣️ Four conditionals look like a memorisation problem on paper and behave like a reflex problem in conversation — you pick one in under a second or you stall. SoraSpeak gives you unscripted spoken practice with AI Japanese teachers, plus instant corrections on grammar, particles and politeness explained in simple English. Free daily tier, in your browser. Start a free speaking session →

Here is the short version: と is for things that happen automatically, ば is for hypothetical and general conditions, たら is the everyday all-rounder that also means when or after, and なら responds to something already said or known. If you want one sentence to carry away, it is this: たら is the safe default, and the other three are the cases where a native speaker would have chosen something more precise.

In this guide: the four in one minute · to · ba · tara · nara · comparison table · even if · which one when speaking · eight mistakes · the drill · bottom line

The four Japanese conditionals in one minute

English has one word, if, doing all of this work. Japanese splits the job four ways, and each form encodes something English leaves to context: how automatic the result is, how hypothetical the condition is, and whether the speaker is reacting to new information or introducing it.

Four sentences, all translatable as "if", all different:

• 春になると、花が咲きます (haru ni naru to, hana ga sakimasu) — "When spring comes, the flowers bloom." Automatic. Nobody decides this.
• 安ければ、買います (yasukereba, kaimasu) — "If it's cheap, I'll buy it." A logical condition on a hypothetical.
• 雨が降ったら、行きません (ame ga futtara, ikimasen) — "If it rains, I won't go." One specific occasion.
• 京都に行くなら、新幹線が便利ですよ (Kyōto ni iku nara, shinkansen ga benri desu yo) — "If you're going to Kyoto, the bullet train is convenient." A reply to something you were just told.

Swap those four particles around and three of the sentences break. That is why "they all mean if" is a trap: the English gloss is identical and the Japanese is not interchangeable.

Here is how each one attaches, in one table, so you can come back to it without re-reading the sections:

To for automatic and natural consequences

Formation: plain non-past form + と. 押す → 押すと, 行かない → 行かないと, 高い → 高いと, 静かだ → 静かだと, 学生だ → 学生だと. The と clause is always non-past, even when the whole sentence is about the past.

Core meaning: A causes B, every time, with nobody choosing it. Think machines, nature, maths, road directions and unbreakable habits.

• このボタンを押すと、ドアが開きます (kono botan o osu to, doa ga akimasu) — "If you press this button, the door opens."
• 春になると、花が咲きます (haru ni naru to, hana ga sakimasu) — "When spring comes, the flowers bloom."
• 右に曲がると、駅があります (migi ni magaru to, eki ga arimasu) — "Turn right and the station is there."
• お酒を飲むと、顔が赤くなります (osake o nomu to, kao ga akaku narimasu) — "When I drink, my face goes red."

The restriction that defines it: because と says the result is automatic, the main clause cannot express anyone's will — no commands, no requests, no invitations, no statements of intention. ×駅に着くと、電話してください is wrong. You want たら there.

Two uses that are worth learning as set pieces:

Directions. Japanese route-giving runs on と, one clause at a time: まっすぐ行くと、信号があります。そこを左に曲がると、右側にあります (massugu iku to, shingō ga arimasu. soko o hidari ni magaru to, migigawa ni arimasu) — "Go straight and there's a traffic light. Turn left there and it's on your right."

The obligation shortcut. 〜ないと on its own is how people say "I have to". もう行かないと (mō ikanai to) — "I've got to go now." The rest of the sentence (…いけません) is simply dropped, and this is extremely common in speech.

There is one apparent exception to the no-will rule, and it is really the same rule: discovery in the past. When the main clause reports something you found rather than something you chose, と is fine:

• 家に帰ると、猫が寝ていました (uchi ni kaeru to, neko ga nete imashita) — "When I got home, the cat was asleep."

Note 帰ると, not ×帰ったと. The と clause never takes past tense.

Ba for hypothetical and general conditions

Formation: this is the most mechanical of the four.

• Godan verbs — change the final -u to -eba: 行く → 行けば (ikeba), 飲む → 飲めば (nomeba), 話す → 話せば (SoraSpeakba), 買う → 買えば (kaeba).
• Ichidan verbs — drop る, add れば: 食べる → 食べれば (tabereba), 見る → 見れば (mireba).
• Irregulars — する → すれば (sureba), 来る → 来れば (kureba).
• Negatives — 〜なければ: 行かなければ (ikanakereba), 食べなければ.
• い-adjectives — drop い, add ければ: 安い → 安ければ (yasukereba), いい → よければ (yokereba).
• Nouns and な-adjectives — these borrow なら: 学生なら, 静かなら. (The formal であれば also exists in writing.)

Core meaning: a hypothetical or general condition, stated logically. It is the conditional of proverbs, advice and reasoning.

• 雨が降れば、試合は中止です (ame ga fureba, shiai wa chūshi desu) — "If it rains, the match is off."
• 安ければ、買います (yasukereba, kaimasu) — "If it's cheap, I'll buy it."
• 塵も積もれば山となる (chiri mo tsumoreba yama to naru) — "Even dust piles up into a mountain." (a proverb, and a good demonstration of why ば is the form textbooks reach for when stating a general truth)

The restriction: if the ば clause contains an action verb and both clauses share a subject, you cannot put a command or request in the main clause. ×東京に行けば、連絡してください is off; use たら. But when the ば clause is stative — ある, いる, 分かる, できる — or an adjective, commands are perfectly fine:

• 時間があれば、来てください (jikan ga areba, kite kudasai) — "If you have time, please come."
• 安ければ、買ってください (yasukereba, katte kudasai) — "If it's cheap, please buy it."

The two ば patterns you will use every single week, worth memorising as whole chunks rather than deriving:

• どうすればいいですか (dō sureba ii desu ka) — "What should I do?"
• 早く行けばよかった (hayaku ikeba yokatta) — "I should have gone earlier." (regret about the past)

Tara the everyday all rounder

Formation: take the plain past form and add ら. Because the past form uses the same sound changes as the te form, たら costs you nothing new.

• 食べた → 食べたら (tabetara), 行った → 行ったら (ittara), した → したら (shitara), 来た → 来たら (kitara)
• Negative: 食べなかった → 食べなかったら (tabenakattara)
• い-adjectives: 高かった → 高かったら (takakattara)
• Nouns and な-adjectives: 学生だったら, 静かだったら

Core meaning one: a specific one-off condition. Not a general rule — this situation, this time.

• 雨が降ったら、行きません (ame ga futtara, ikimasen) — "If it rains, I'm not going."
• 宝くじが当たったら、家を買います (takarakuji ga atattara, ie o kaimasu) — "If I win the lottery, I'll buy a house."
• 分からなかったら、聞いてください (wakaranakattara, kiite kudasai) — "If you don't understand, please ask."

Core meaning two: when or after, for something certain. This is the use that beginners under-produce because they translate たら as "if" every time.

• 家に帰ったら、電話します (uchi ni kaettara, denwa shimasu) — "I'll call you when I get home." Not if — you are definitely going home.
• 駅に着いたら、連絡してください (eki ni tsuitara, renraku shite kudasai) — "Please contact me when you arrive at the station."
• 大人になったら、日本に住みたいです (otona ni nattara, Nihon ni sumitai desu) — "When I grow up, I want to live in Japan."

Core meaning three: past discovery, the same job と does, but with the たら clause completed first.

• 窓を開けたら、雪が降っていました (mado o aketara, yuki ga futte imashita) — "When I opened the window, it was snowing."

Why it is the default: たら takes commands, requests, invitations and intentions in the main clause without complaint. It handles both "if" and "when". It works for one-off events, which is what most conversation is about. And it powers the standard suggestion pattern:

• 医者に行ったらどうですか (isha ni ittara dō desu ka) — "Why don't you go to a doctor?"

Nara for reacting to what someone just said

Formation: the easiest of the four. Attach なら directly to a plain form or a bare noun — no だ before it.

• Verbs: 行く → 行くなら, 行った → 行ったなら
• い-adjectives: 安い → 安いなら
• な-adjectives: 静か → 静かなら
• Nouns: 学生 → 学生なら, 明日雨 → 明日雨なら

Core meaning: "if that is the case". なら takes information that is already on the table — usually something your conversation partner just said — and builds a response on it. It is the most conversational of the four, and the one that makes you sound like you are actually listening.

• A: 週末、京都に行きます。 B: 京都に行くなら、清水寺がおすすめです (Kyōto ni iku nara, Kiyomizu-dera ga osusume desu) — "If you're going to Kyoto, I recommend Kiyomizu-dera."
• A: 頭が痛いんです。 B: 痛いなら、薬を飲んだほうがいいですよ (itai nara, kusuri o nonda hō ga ii desu yo) — "If it hurts, you should take something."
• 寿司なら、あの店が一番です (sushi nara, ano mise ga ichiban desu) — "If it's sushi you want, that place is the best."

The timing property that nothing else has: with なら, the main clause can happen before the なら clause. Compare these two carefully, because this single contrast is the whole なら-versus-たら question:

• 京都に行くなら、新幹線の切符を買っておいたほうがいいですよ — "If you're going to Kyoto, you should buy the bullet train ticket in advance." Buying happens before going.
• 京都に行ったら、お土産を買ってきてください — "When you go to Kyoto, please buy me a souvenir." Buying happens after arriving.

Swap those and both sentences become nonsense. Every other conditional in Japanese runs in time order; なら does not, because it is conditioning on a topic, not on an event. If that idea feels familiar, it is the same instinct behind は in our particles guide — なら is essentially a conditional topic marker.

What なら cannot do: it cannot describe an automatic natural result. ×春になるなら、花が咲きます is wrong, because nobody told you spring was coming — that is と territory.

The conditional comparison table

Temo for even if

The fifth member of the family, and the one that flips the logic: instead of "A, therefore B", 〜ても says "A, and B anyway".

Formation: te form + も. Which means you already know it if you have the te form down.

• Verbs: 降る → 降って → 降っても (futte mo)
• い-adjectives: 高い → 高くて → 高くても (takakute mo)
• Nouns and な-adjectives: 学生 → 学生でも (gakusei demo), 便利 → 便利でも
• Negatives: 行かない → 行かなくて → 行かなくても (ikanakute mo)

Examples:

• 雨が降っても、行きます (ame ga futte mo, ikimasu) — "I'll go even if it rains."
• 高くても、買います (takakute mo, kaimasu) — "I'll buy it even if it's expensive."
• 子どもでも分かります (kodomo demo wakarimasu) — "Even a child would understand."

Two high-value patterns built on it:

〜なくてもいい — you do not have to. 明日は来なくてもいいです (ashita wa konakute mo ii desu) — "You don't have to come tomorrow." This is the single most useful ても sentence in daily life, and it is the mirror image of the 〜てもいい permission pattern.

Question word + ても — no matter what. 何を言っても、彼は聞きません (nani o itte mo, kare wa kikimasen) — "No matter what you say, he won't listen." どんなに難しくても、続けます (donna ni muzukashikute mo, tsuzukemasu) — "However hard it is, I'll keep going."

Which conditional should I use when speaking

Here is the honest hierarchy, ordered by what will actually help you in a live conversation rather than by what a textbook covers first.

1. Default to たら. It is grammatical in more situations than any other form, it accepts requests and commands, and it covers both "if" and "when". If you have half a second to decide, choose たら. A slightly less precise たら is almost never wrong; a と with a request in it is.

2. Use と when the result is a fact of the universe. Machines, seasons, road directions, physical reactions, unbreakable habits. If you could not add "…if you feel like it" to the main clause, と is probably right.

3. Use なら when you are replying. The trigger is conversational, not grammatical: the other person just said something, and you are building on it. Learn it as a response pattern — 行くなら, 買うなら, 疲れているなら — and it stops feeling abstract immediately.

4. Learn ば as chunks, not as a rule. In everyday speech, ば shows up most often inside fixed expressions. Memorise どうすればいいですか, 〜ばよかった, 〜ばいいのに, and よければ. You can derive the rest later; you will rarely need to build a fresh ば form under time pressure.

5. Add ても early. 〜なくてもいい alone earns its keep — it is how you tell someone not to bother, which comes up constantly.

That ordering is deliberately unbalanced, because conversation is unbalanced. A learner who produces たら fluently and と correctly sounds far better than one who can conjugate all four but hesitates for two seconds choosing between them. If the hesitation itself is your problem, we wrote about it separately in how to stop freezing when speaking Japanese.

Eight conditional mistakes and their fixes

1. と with a request or command. ×駅に着くと、電話してください → ○駅に着いたら、電話してください (eki ni tsuitara, denwa shite kudasai). と means automatic; a request is a choice. This is the single most common conditional error learners make.

2. Past tense inside the と clause. ×家に帰ったと、猫が寝ていました → ○家に帰ると、猫が寝ていました (uchi ni kaeru to, neko ga nete imashita). The と clause stays non-past no matter what the main clause does.

3. だ before なら. ×学生だなら → ○学生なら (gakusei nara). なら attaches to the bare noun. Same for な-adjectives: 静かなら, not ×静かだなら.

4. なら for natural results. ×春になるなら、花が咲きます → ○春になると、花が咲きます (haru ni naru to, hana ga sakimasu). なら needs information someone put on the table; the seasons do not announce themselves.

5. ば plus a command with an action verb. ×東京に行けば、連絡してください → ○東京に行ったら、連絡してください (Tōkyō ni ittara, renraku shite kudasai). Keep ば for stative clauses and adjectives when a request follows.

6. Translating たら as if every time. 大人になったら is "when I grow up", not "if I grow up". 家に帰ったら is "when I get home". Certainty decides the English, not the grammar.

7. Reaching for なら when nothing was said. なら responds. If you are introducing the condition yourself, out of the blue, たら is the right form: 時間があったら、映画を見ます (jikan ga attara, eiga o mimasu).

8. Forgetting ても with nouns becomes でも. ×学生でても → ○学生でも (gakusei demo). The te form of a noun is で, so the も simply attaches to it.

A five minute conditional speaking drill

This is the part that transfers. Reading a comparison table builds recognition; the four-way choice under time pressure is a separate skill and only speaking trains it.

Round one — たら, ninety seconds. Take five things that will definitely happen today and say each as a たら sentence out loud: 家に帰ったら、ご飯を作ります。仕事が終わったら、買い物に行きます。 The goal is the when meaning, said without pausing.

Round two — と, ninety seconds. Describe how three objects in the room work: このボタンを押すと、電気がつきます。 Machines only. If you catch yourself wanting to add ください, you have picked the wrong form — notice the pull, then switch to たら.

Round three — なら, two minutes. This one needs a partner, real or simulated. They state a plan; you respond with なら plus advice. 日本語を勉強しています。 → 日本語を勉強するなら、毎日話したほうがいいですよ。 Five exchanges.

Round three is where most solo study stops working, because なら is defined by reacting to what someone else just said and there is nobody to react to. That is the specific gap SoraSpeak fills: you speak out loud in the browser, an AI Japanese teacher replies in natural Japanese with subtitles and keeps giving you new statements to react to, and every conditional you pick wrong comes back corrected in simple English while you still remember why you chose it. Being honest: it is a new product, it complements conversation with real people rather than replacing it, and no software fully substitutes for a good teacher. But for the narrow job of making forty conditional decisions in ten minutes and being told which ones missed, it beats a textbook.

For input, NHK News Web Easy is free and short, and news writing is unusually dense in と and ば — weather and process descriptions especially. The Japan Foundation publishes learner materials organised around communicative tasks, which is the right frame for conditionals since each form belongs to a different kind of exchange. And if a certificate is in your plan, the official JLPT site lists what each level covers, though it tests reading and listening only — a conditional you recognise on paper is not one your mouth produces on time.

The bottom line

と for automatic results. ば for hypotheticals and fixed phrases. たら for everything else, including when and after. なら for replying to what was just said. ても for even if. Five lines, and everything above is elaboration.

The practical compression is smaller still. Default to たら. Reserve と for machines, nature and directions, and remember it can never carry a request. Trigger なら when you are responding to someone. Bank ば as chunks — どうすればいいですか and 〜ばよかった will cover most of your real usage. Add 〜なくてもいい because you will need it this week.

Then say them. The forms take an afternoon; choosing between them in under a second takes output. Our beginner Japanese conversation guide gives you situations to put them in, the daily Japanese conversation phrases list has conditionals baked into ready-made expressions, and the te form guide covers the conjugation that たら and ても are both built on.

🗣️ Four conditionals, chosen in real time, corrected the same minute you get them wrong. Practise speaking Japanese free →

SoraSpeak is an independent Japanese speaking-practice app. Example sentences are written for learners; natural usage can vary by context and region.

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