zitensyahoken wo kakuninsuru.

It is read:

じてんしゃほけん を かくにんする

Broken down:

• 自転車 = じてんしゃ
• 保険 = ほけん
• 確認する = かくにんする

So the whole phrase is:

じてんしゃほけんをかくにんする

In normal Japanese writing, it would usually be written without spaces.

Japanese normally does not use spaces between words like English does.

So the standard written form is:

自転車保険を確認する。

The spaces here were probably added just to make the parts easier for learners to see:

• 自転車保険
• を
• 確認する

を marks the direct object of the verb.

In this sentence:

• 自転車保険 = the thing being checked
• 確認する = to check / confirm / verify

So を shows that 自転車保険 is what the action is being done to.

A very literal breakdown would be:

• 自転車保険 — bicycle insurance
• を — object marker
• 確認する — check / confirm

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

So 自転車保険を確認する could mean things like:

• I check bicycle insurance
• You should check bicycle insurance
• Check bicycle insurance
• To check bicycle insurance

The exact subject or tone depends on where the sentence appears. For example:

• on a checklist
• in an instruction manual
• in a reminder
• as a heading or task item

This kind of omission is very normal in Japanese.

Both are possible, but they feel a little different.

• 自転車保険 is a compound noun. It sounds compact and official, like a standard category name: bicycle insurance
• 自転車の保険 is more literally insurance for bicycles and sounds a bit more explanatory or conversational

In practical Japanese, especially in forms, websites, notices, and official language, 自転車保険 is very common.

So this sentence sounds natural, especially in a checklist or administrative context.

Grammatically, it is 確認 + する.

• 確認 is a noun meaning confirmation / checking
• する is the verb to do

Together, they make the verb 確認する, meaning to confirm, to check, or to verify.

This is a very common Japanese pattern:

• 勉強する = to study
• 連絡する = to contact
• 確認する = to confirm/check

These are often called suru-verbs in Japanese textbooks.

Not exactly.

確認する is more like:

• to confirm
• to verify
• to make sure
• to check carefully

It suggests a deliberate check to make sure something is correct or in order.

By contrast, 見る just means to see / look at.

So:

• 自転車保険を見る = look at the bicycle insurance
• 自転車保険を確認する = check/confirm the bicycle insurance

In this sentence, 確認する sounds more purposeful and practical.

する is the plain/dictionary form.

This form is often used in:

• headings
• labels
• checklist items
• notes
• manuals
• short written instructions

So 自転車保険を確認する can sound like a task name, such as:

• Check bicycle insurance

If you want a polite sentence, you could say:

• 自転車保険を確認します。 = I will check the bicycle insurance.
• 自転車保険を確認してください。 = Please check the bicycle insurance.

It can function as a complete sentence in Japanese, but in many contexts it feels like a task statement or instruction label.

For example, it could appear as:

• a to-do list item
• a checklist instruction
• a heading in a document
• a reminder on a website

Japanese often uses the plain form like this in short written instructions, so it may feel less like a full conversational sentence and more like Check bicycle insurance as a task.

By itself, it is usually softer and more neutral than a direct command.

自転車保険を確認する often feels like:

• a checklist item
• a stated action
• an instruction heading

If you want a clear command, Japanese would more directly use forms like:

• 自転車保険を確認してください。 = Please check the bicycle insurance.
• 自転車保険を確認しなさい。 = Check the bicycle insurance.
  
  • This sounds strong and is less common in everyday polite situations.

So the original sentence is not the most direct command form, but it can still function like an instruction depending on context.

Yes. In this sentence, 自転車保険 is understood as one compound noun meaning bicycle insurance.

It is made from:

• 自転車 = bicycle
• 保険 = insurance

Japanese very often combines nouns this way, especially in formal or technical language.

Other similar examples are:

• 生命保険 = life insurance
• 健康保険 = health insurance
• 海外旅行保険 = overseas travel insurance

So seeing several kanji/kana parts joined together as one noun is very normal.

In conversation, people might use slightly fuller or softer expressions, such as:

• 自転車保険を確認してください。
  Please check your bicycle insurance.

• 自転車保険、確認した？
  Did you check the bicycle insurance?

• 自転車保険をちゃんと確認したほうがいいよ。
  You should make sure to check the bicycle insurance properly.

The original 自転車保険を確認する。 sounds especially natural in written, instructional, or list-like contexts rather than casual conversation.