Want to in Japanese: How to Use the ~たい (tai) Form

The ~たい (tai) form is one of the most immediately rewarding grammar patterns in Japanese. One rule gives you the ability to express almost any personal desire: I want to eat ramen, I want to visit Kyoto, I want to speak Japanese. This guide covers everything in one place — how to build the form, all of its conjugations, the usage rules many beginners miss, and the most common errors to avoid.

What Is ~たい and How Do You Build It?

~たい attaches to the ます stem — the part of a verb that remains after you remove ます — and expresses the speaker's personal desire to do something. The result behaves exactly like an い-adjective, which means negation, past tense, and politeness all follow predictable adjective rules.

The rule in one line: Remove ます → add たい.

If some of these verbs are unfamiliar, the common verbs guide is the right place to build that vocabulary first. For a full explanation of how Japanese verb groups work and why removing ます reveals the stem, the verb basics lesson has you covered. The ます stem is also the same stem used when forming the て form, so mastering it here carries straight across to other patterns.

Particle note: The object in a ~たい sentence can take either を or が. Both すしを食べたい and すしが食べたい are natural. を is the neutral everyday choice; が places extra emphasis on the object — closer to It's sushi that I want to eat.

Polite, Negative, and Past Tense

Because ~たい works like an い-adjective, all of its forms are predictable:

Use plain forms in casual conversation with friends and family. Switch to the です-ending forms whenever speaking with someone you don't know well, someone older than you, or in any setting where respectful speech is expected.

Who Can Use ~たい? The First-Person Rule

~たい describes your own desires only — you cannot use it to directly state what someone else wants. This is both a grammar rule and a reflection of a wider principle in Japanese communication: claiming direct knowledge of another person's inner feelings is considered presumptuous, so the language provides a different tool for the job.

To describe what a third person wants, use ~たがっている (tagatteiru), which translates roughly as "is showing signs of wanting to":

彼は日本に行きたがっています。 Kare wa Nihon ni ikitagatte imasu. He wants to go to Japan. (Lit. He is showing signs of wanting to go.)

You can also report what someone said they want with ～たいと言っていた (tai to itte ita, "said that [they] wanted to ~"), which attributes the desire to its source and sidesteps the presumption entirely.

~たい vs 欲しい: Wanting to Do vs Wanting a Thing

~たい and 欲しい (hoshii) are the two main "want" expressions in Japanese, and the rule separating them is clean:

• ~たい = want to do something → attaches to a verb
• 欲しい = want to have something → follows a noun

Notice that 欲しい takes が for the desired object, whereas ~たい typically takes を for the object of the verb. Keeping the verb-versus-noun distinction in mind prevents the most common confusion between these two forms.

Example Sentences in Context

These five sentences span everyday situations — travel, study, food, past regret, and weekend plans:

1. 日本に行きたいです。 Nihon ni ikitai desu. I want to go to Japan.

2. もっと日本語を話したい。 Motto Nihongo wo hanashitai. I want to speak more Japanese.

3. 今夜は何も食べたくない。 Konya wa nanimo tabetakunai. I don't want to eat anything tonight.

4. 子供のころ、パイロットになりたかった。 Kodomo no koro, pairotto ni naritakatta. When I was a child, I wanted to become a pilot.

5. 週末に映画を見たいです。 Shūmatsu ni eiga wo mitai desu. I want to watch a movie this weekend.

Want to use sentences like these in a real conversation right now? Start a Free Trial lesson with Kind Japanese and practice ~たい with a native-speaking teacher over LINE.

Common Mistakes

1. Attaching たい to the dictionary form The most frequent error — learners forget to remove ます first.

✗ 食べるたい (taberutai) ✓ 食べたい (tabetai)

Always remove ます to find the stem, then add たい.

2. Using ~たい for a third person ~たい only works for the speaker's own desires.

✗ 彼は行きたいです。(Kare wa ikitai desu.) — claims to know his feelings directly ✓ 彼は行きたがっています。(Kare wa ikitagatte imasu.) — describes visible signs of wanting to go

The first sentence asserts knowledge of his inner state. Japanese avoids that directness — たがっている is the right form.

3. Using ~たい when the desire is for a thing, not an action ~たい requires a verb. If you want an object, use 欲しい.

✗ コーヒーがたい — grammatically impossible ✓ コーヒーが欲しい (kōhī ga hoshii) — I want (a) coffee

4. Confusing たくない (negative present) with たかった (past affirmative) These sound similar but mean opposite things:

• 食べたくない (tabetakunai) = I don't want to eat
• 食べたかった (tabetakatta) = I wanted to eat (in the past)

Swapping them inverts the meaning of the whole sentence.

Practice Quiz

Try answering each question before revealing the key.

Part 1 — Convert to ~たい form

Part 2 — Translate into English

Part 3 — Translate into Japanese

▶ Reveal answers **Part 1** | # | ~たい Form | Romaji | |---|---|---| | 1 | 食べたい | tabetai | | 2 | 飲みたい | nomitai | | 3 | 行きたい | ikitai | | 4 | 見たい | mitai | | 5 | したい | shitai | **Part 2** | # | Answer | |---|---| | 6 | I want to eat sushi | | 7 | I want to drink water | | 8 | I want to go to school | **Part 3** | # | Japanese | Romaji | |---|---|---| | 9 | 本を読みたい | hon wo yomitai | | 10 | 行きたくない | ikitakunai |

FAQ

Can I use ~たい when talking about someone else?

No — ~たい is restricted to the speaker's own desires. For third-person statements, use ~たがっている, which describes someone as visibly showing desire. For example: 彼女は新しいスマホを欲しがっています (Kanojo wa atarashii sumaho wo hoshigatte imasu, "She seems to want a new phone"). You can also report what someone said they want using ～たいと言っていた (tai to itte ita).

What is the difference between ~たい and 欲しい?

~たい attaches to verbs and means "want to do" something. 欲しい (hoshii) follows nouns and means "want to have" something. Use 食べたい (tabetai) when you want to eat, and ケーキが欲しい (kēki ga hoshii) when you want a cake. The verb-versus-noun distinction is the clearest way to keep the two separate.

How do I make ~たい negative?

Replace the final い of たい with くない: たい → たくない (takunai). Add です for the polite version: たくないです (takunai desu). For past negative, use たくなかった (takunakatta). These conjugations follow standard い-adjective rules, so the pattern feels familiar once you know other い-adjectives.

Is ~たいです polite enough for formal situations?

~たいです works well for everyday polite contexts — with teachers, shopkeepers, and acquaintances. In very formal or written Japanese, the softer expression ～たいと思っています (tai to omotte imasu, "I am hoping to ~") sounds more appropriately modest by framing the desire as a thought rather than a direct declaration.

Continue Learning

• ← Expressing existence with ある and いる in Japanese
• → Making polite requests with ~てください in Japanese

This is Lesson 54 of the Kind Japanese 100-day beginner curriculum.