ryoukinpuran wo kakuninsuru.

を marks the direct object of the verb. In this sentence, 料金プラン is the thing being checked or confirmed, so it takes を.

• 料金プランを確認する
• Check/confirm the pricing plan

A very literal breakdown is:

• 料金プラン = pricing plan / fee plan
• を = object marker
• 確認する = to check / to confirm

So を shows that 料金プラン is what the action is being done to.

料金プラン is a compound noun made of:

• 料金 = fee, charge, rate
• プラン = plan

Together, 料金プラン means something like pricing plan, rate plan, or subscription plan, depending on context.

This kind of noun + noun combination is very common in Japanese. The first noun modifies the second:

• 料金プラン = a plan related to fees/pricing
• similar idea: 旅行プラン = travel plan

So the whole phrase is just one noun unit.

The dictionary form 確認する is very commonly used in:

• menu items
• buttons
• headings
• instructions
• neutral written labels

So this kind of sentence often sounds like a command label or action name, such as something you would see in an app or on a website.

Compare:

• 料金プランを確認する = check pricing plans / to check pricing plans
  
  • neutral, label-like, dictionary form
• 料金プランを確認します = I will check the pricing plan / we check the pricing plan
  
  • a full polite sentence

In interfaces and lists of actions, Japanese often uses the dictionary form where English might use something like Check pricing plans.

It is basically a noun plus する:

• 確認 = confirmation / checking
• する = to do

Together:

• 確認する = to confirm / to check

This is a very common pattern in Japanese. Many Sino-Japanese nouns can become verbs with する.

For example:

• 勉強する = to study
• 予約する = to reserve
• 確認する = to confirm/check

So 確認する behaves as a verb, even though it is built from a noun.

Not exactly.

確認する means more than just look at. It has the nuance of:

• checking carefully
• verifying
• making sure
• confirming details

By contrast:

• 見る = to see / to look at
• 確認する = to check/confirm and make sure something is correct

So if you are reviewing a pricing plan to verify details, 確認する is more appropriate than 見る.

You may also see チェックする, which is similar, but 確認する often sounds a bit more formal or standard in written Japanese.

Japanese often leaves out the subject when it is obvious from context.

So instead of explicitly saying:

• 私は料金プランを確認する
• あなたは料金プランを確認する

Japanese often just says:

• 料金プランを確認する

This is especially normal in short written text, app interfaces, instructions, and notes. The missing subject is understood from the situation.

Depending on context, it could mean:

• I check the pricing plan
• to check the pricing plan
• check the pricing plan
• checking the pricing plan

Japanese relies heavily on context for this.

The standard order here is:

• 料金プラン
  • を
    • 確認する

Japanese usually puts the verb at the end, so this is the most natural basic order.

Because particles show the grammatical role, Japanese word order can sometimes be more flexible than English. But in a simple sentence like this, the natural order is exactly what you see.

So for learners, the safest pattern is:

• object + を + verb

In this case:

• 料金プランを確認する

Yes. That would be the polite form.

• 確認する = plain/dictionary form
• 確認します = polite form

The difference is not really in the core meaning, but in style and usage.

• 料金プランを確認する
  often used in headings, labels, casual writing, dictionary entries, or plain style
• 料金プランを確認します
  used in polite conversation or formal statements

So both are correct; the choice depends on context.

Because Japanese often combines nouns directly into compound nouns without using の.

• 料金プラン sounds natural as a fixed compound: pricing plan
• 料金のプラン is grammatically possible in some contexts, but it sounds less natural here

In many cases, when two nouns form a standard term, Japanese prefers the compact compound form.

So 料金プラン is the natural expression you are likely to see in real life, especially in business, apps, and websites.

Yes. Both are possible, depending on context.

確認する often covers a range that includes:

• check
• confirm
• verify
• make sure of

That is why a single English translation does not always capture the full nuance. For example:

• checking details on a plan
• confirming which plan applies
• verifying the contents of a plan

All of those can be 確認する in Japanese.

So if you were learning this sentence, it is good to remember that 確認する is broader than just one exact English verb.

It often appears as a short action phrase rather than a full conversational sentence.

For example, you might see it as:

• a button label
• a menu option
• a help-page heading
• an instruction in a guide

In those situations, Japanese often uses plain, compact expressions without a subject and with the verb in dictionary form.

So rather than thinking of it only as a full sentence like Someone checks the pricing plan, it may be more helpful to think of it as an interface/action phrase: Check pricing plans or View pricing plan details.