syouhinsetumei wo yomimasu.

It is read:

しょうひんせつめい を よみます
Romanized: shouhin setsumei o yomimasu

A few pronunciation notes:

• 商品 = しょうひん (shouhin) = product / merchandise
• 説明 = せつめい (setsumei) = explanation / description
• を is written を but pronounced お in modern Japanese
• 読みます = よみます (yomimasu) = read

So the full sentence sounds like:

shouhin setsumei o yomimasu

商品説明 is a compound noun made of:

• 商品 = product, item, merchandise
• 説明 = explanation, description

Together, 商品説明 means product description or product explanation.

In natural English, this sentence is usually understood as I read the product description or (someone) reads the product description.

を marks the direct object of the verb.

In this sentence:

• 商品説明 = the thing being read
• 読みます = read
• so を shows that 商品説明 is what is being read

A very literal breakdown is:

• 商品説明 = product description
• を = object marker
• 読みます = read

So: Read the product description / (I) read the product description.

This is just how modern Japanese works.

Historically, を had a different pronunciation, but in modern standard Japanese it is usually pronounced the same as お. Even so, the particle is still written as を when it marks the direct object.

So in this sentence:

• written: 商品説明を読みます
• pronounced: しょうひんせつめい お よみます

This is very common, and learners simply memorize that the object particle を is normally pronounced お.

Japanese usually puts the verb at the end of the sentence.

So the basic pattern here is:

object + を + verb

In this sentence:

• 商品説明 = object
• を = object marker
• 読みます = verb

This is different from English, where we usually say:

I read the product description

Japanese often feels more like:

Product description + object marker + read

Putting the verb at the end is one of the most important sentence patterns in Japanese.

読みます is the polite non-past form of the verb 読む.

• Dictionary form: 読む = to read
• Polite form: 読みます = read / will read

Japanese often uses the -ます form in neutral polite speech, especially in textbooks, conversations with strangers, customer situations, and formal contexts.

So:

• 商品説明を読む。 = plain style
• 商品説明を読みます。 = polite style

Both are grammatically correct, but 読みます sounds more polite.

It can mean either, depending on context.

The Japanese non-past form often covers both:

• present habitual: read / reads
• near future: will read

So 商品説明を読みます could mean:

• I read the product description
• I will read the product description
• He/She reads the product description

Context tells you which one is intended.

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

So 商品説明を読みます does not explicitly say:

• I read
• you read
• he/she reads
• we will read

Any of these could be possible depending on the situation.

This is extremely normal in Japanese. If the speaker needs to be explicit, they could say:

• 私は商品説明を読みます。 = I read / will read the product description
• 彼は商品説明を読みます。 = He reads / will read the product description

But very often, Japanese leaves the subject unstated.

No. Normal Japanese writing usually does not use spaces between words.

The sentence is normally written as:

商品説明を読みます。

Spaces are often added in beginner materials to make the structure easier to see:

• 商品説明
• を
• 読みます

So the spaced version is a learning aid, not standard everyday writing.

In Japanese, it functions as a single compound noun.

It is made from two nouns:

• 商品
• 説明

But when combined, they form one unit: 商品説明.

This kind of noun compounding is very common in Japanese. English does this too in expressions like product description, but Japanese often writes the whole compound together without spaces.

Yes, you often can.

• 商品説明 = product description
• 商品の説明 = explanation/description of the product

These are very similar, but there is a small nuance:

• 商品説明 sounds like a set compound term, often used in labels, websites, catalogs, or business contexts
• 商品の説明 feels a little more explicitly like the explanation of the product

In many situations, both are natural.
For example:

• 商品説明を読みます。
• 商品の説明を読みます。

Both can work, though 商品説明 is especially common as a fixed phrase.

The plain casual version is:

商品説明を読む。

Here:

• 読む = dictionary/plain form
• 読みます = polite form

So the difference is mainly politeness:

• 商品説明を読みます。 = polite
• 商品説明を読む。 = plain/casual

Be careful: plain does not always mean rude. It is simply the style used with friends, family, informal writing, inner thoughts, and so on.

Here are some common forms of 読む:

• 商品説明を読みます。 = I read / will read the product description
• 商品説明を読みました。 = I read / I have read the product description
• 商品説明を読みません。 = I do not read / will not read the product description
• 商品説明を読みませんでした。 = I did not read the product description

Plain forms:

• 商品説明を読む。 = read / will read
• 商品説明を読んだ。 = read
• 商品説明を読まない。 = do not read / will not read
• 商品説明を読まなかった。 = did not read

This is a useful pattern to practice with many verbs, not just 読む.