suupaa ni haittara, mazu kaimonokago wo totte, yasai uriba he iku.

入ったら is the -tara conditional form of 入る meaning to enter.

So:

• 入る = to enter
• 入った = entered
• 入ったら = when/after entering or sometimes if you enter

In this sentence, it most naturally means when/after you enter the supermarket.

A very common beginner question is why Japanese uses something that looks like a past form here. The reason is that -たら is just the grammatical pattern used to make this kind of condition or sequence. It does not mean the whole sentence is in the past. It often gives the sense of:

• first A happens
• then B happens

So スーパーに入ったら、まず... means something like Once you go into the supermarket, first...

With 入る (to enter), Japanese normally marks the place being entered with に.

So:

• スーパーに入る = enter the supermarket
• 部屋に入る = enter the room
• お風呂に入る = get into the bath

Here, に marks the destination or place you go into.

This is different from English, where enter directly takes an object: enter the supermarket. In Japanese, 入る does not work that way. You do not say スーパーを入る in standard Japanese.

まず means first of all or first.

It tells you that this is the first action in a sequence:

1. enter the supermarket
2. first, take a shopping basket
3. go to the vegetable section

So まず helps organize the actions clearly. Without it, the sentence would still make sense, but まず makes the order feel more natural and instructional.

買い物かご means shopping basket.

It is made up of:

• 買い物 = shopping
• かご / 籠 = basket

So literally it is a shopping basket.

You will often see this written in mixed script as 買い物かご, where 買い物 uses kanji and hiragana, while かご is often written in hiragana instead of the kanji 籠, because that is more common and easier to read.

を marks the direct object of the verb.

Here, the verb is 取る (to take / pick up / get), so the thing being taken is marked with を:

• 買い物かごを取る = take a shopping basket

So 買い物かごを tells you what the person picks up.

取って is the -te form of 取る. The -te form is often used to connect actions in sequence.

So:

• 買い物かごを取って、野菜売り場へ行く
• take a shopping basket, and go to the vegetable section

The nuance is that these actions happen one after another.

This is very common in Japanese:

• ドアを開けて、部屋に入る = open the door and enter the room
• 席に座って、本を読む = sit down and read a book

So 取って links take a basket to the next action go to the vegetable section.

Yes, に could also be used here.

Both of these are natural:

• 野菜売り場へ行く
• 野菜売り場に行く

With 行く:

• へ emphasizes direction: toward
• に emphasizes destination: to

In many everyday sentences, the difference is small, and both are often translated the same way.

So 野菜売り場へ行く means go to the vegetable section or head to the vegetable section.

Yes, 野菜売り場 is a compound noun meaning vegetable section or produce section.

It is built from:

• 野菜 = vegetables
• 売り場 = sales area / section / department floor space

Together:

• 野菜売り場 = the section where vegetables are sold

There is no particle because this is not a full phrase like 野菜の売り場 in ordinary use. It is a noun compound, which is very common in Japanese.

Other similar examples are:

• 本売り場 = book section
• 魚売り場 = fish section
• レジ売り場 would sound odd, because 売り場 is specifically a place where goods are sold, so the combination has to make sense semantically

The sentence is in plain form, not polite form.

• 行く = plain form
• 行きます = polite form

Japanese often uses the plain form in:

• casual speech
• instructions in a neutral style
• written explanations
• textbook example sentences

So this sentence sounds like a neutral description of a routine or a set of steps.

If you wanted to make it polite, you could say:

• スーパーに入ったら、まず買い物かごを取って、野菜売り場へ行きます。

That would mean the same thing, but with a more polite tone.

The subject is omitted because Japanese often leaves out information that is obvious from context.

In a sentence like this, the understood subject is usually:

• you in an instruction-like context
• someone in a general description
• I/we if the surrounding context makes that clear

So depending on context, this could mean something like:

• When you enter the supermarket, first take a shopping basket and go to the vegetable section.
• When entering a supermarket, one first takes a shopping basket and goes to the vegetable section.

Omitting the subject is completely normal in Japanese.

Grammatically, -たら can mean either if or when, depending on context.

Here, when/after is the better interpretation, because entering the supermarket is not being presented as a doubtful condition. It is the starting point of a sequence of actions.

So this sentence is not really saying:

• If you happen to enter the supermarket...

It is more like:

• When you enter the supermarket...
• After entering the supermarket...

This is a very common use of -たら when one action naturally leads to the next.