kono syasin ha syouko desu.

この means this and directly modifies a noun. Here it modifies 写真, so この写真 means this photo.

A key point is that この must be followed by a noun. You can say:

• この写真 = this photo
• この本 = this book

But you cannot use この by itself to mean this. If you want this on its own, you use これ.

• これは証拠です。 = This is evidence.
• この写真は証拠です。 = This photo is evidence.

Because この and これ have different jobs.

• この = this + noun
• これ = this by itself

So:

• この写真 = this photo
• これ = this

That is why これ写真 is incorrect.

は marks the topic of the sentence. In この写真は証拠です, the topic is この写真.

So the sentence is structured like:

• As for this photo, it is evidence.

This is one reason Japanese sentences can feel different from English. The sentence is not always built around a strict subject + verb + object pattern. Instead, it often introduces a topic first, then says something about it.

Also, even though it is written は, here it is pronounced wa.

Using は presents この写真 as the topic: This photo, as for it, is evidence.

If you used が instead, the nuance would change. が often marks the grammatical subject more directly and can sound more identifying or contrastive depending on context.

• この写真は証拠です。 = This photo is evidence. / As for this photo, it is evidence.
• この写真が証拠です。 = This photo is the evidence. / This is the photo that counts as evidence.

The が version may sound like you are singling out this photo from other possibilities.

証拠 is a noun meaning evidence or proof depending on context. In this sentence, it is the thing that この写真 is being identified as.

So the pattern is:

• A は B です
• A is B

Here:

• A = この写真 = this photo
• B = 証拠 = evidence

So この写真は証拠です means This photo is evidence.

In beginner translations, です is often treated like is, and that works well here.

But more exactly, です is a polite sentence ending that makes the statement sound formal or neutral-polite. It often appears in sentences where English uses is/am/are, especially after nouns and na-adjectives.

So:

• 証拠です = is evidence / it is evidence

In casual speech, です may be dropped:

• この写真は証拠だ。
• この写真は証拠。 (very casual, context-dependent)

Japanese does not have articles like a, an, and the.

So 証拠 can mean:

• evidence
• the evidence
• some evidence

The exact meaning depends on context.

In English, we must choose something like This photo is evidence or This photo is the evidence, but in Japanese the noun itself does not change for that.

The spaces are usually just for learners. Normal Japanese writing does not normally use spaces between words like this.

So a natural written version is:

• この写真は証拠です。

Japanese readers understand word boundaries through their knowledge of grammar, particles, and the mix of kanji and kana.

It is pronounced:

• kono shashin wa shouko desu

A few notes:

• は is pronounced wa here, not ha
• 写真 = shashin
• 証拠 = shouko or sometimes written in romanization as shōko

A rough pronunciation guide:

• ko-no sha-shin wa shoh-ko de-su

In natural speech, desu often sounds closer to des than a fully pronounced de-su.

Yes. 写真 commonly means photo, photograph, or even picture, depending on context.

In everyday English, photo is usually the most natural translation. But grammatically, they are the same noun here.

Examples:

• この写真 = this photo
• 古い写真 = an old photograph

Yes, depending on context. 証拠 can be translated as evidence or proof, and 写真 can sometimes be translated as picture or photograph.

So possible English translations include:

• This photo is evidence.
• This photograph is evidence.
• This picture is proof.

If the meaning has already been given to the learner, the main grammar point is that the Japanese sentence itself is simply identifying this photo as evidence/proof.

Yes, Japanese often omits information that is clear from context. But whether you can omit it depends on what the listener already knows.

For example, if everyone is already looking at the photo, someone might just say:

• 証拠です。 = It is evidence.

However, when introducing the idea clearly and fully, この写真は証拠です is the complete sentence.

Yes, it is grammatically natural. It sounds like a straightforward statement, especially in a serious context such as an investigation, argument, or explanation.

Depending on context, native speakers might also say things like:

• この写真が証拠です。 = This photo is the evidence.
• この写真は証拠になります。 = This photo serves as evidence.

But この写真は証拠です。 is a perfectly good basic sentence for learning this structure.