kama de no syousei ha zikan ga kakaru.

It is read:

かまでの しょうせい は じかん が かかる。

Word by word:

• 窯 → かま
• 焼成 → しょうせい
• 時間 → じかん

A learner may not know 窯 and 焼成, because both are relatively specialized words.

で marks the place where an action happens.

Here, the action is 焼成 (firing/baking), so 窯で means in a kiln / at the kiln as the place of firing.

Compare:

• 窯で焼成する = to fire something in a kiln
• 学校で勉強する = to study at school

に is usually used for destination, existence, or a point in time, so it would not be the natural choice here.

での is a very common pattern:

• で = at / in / by means of
• の = connects that phrase to a noun

So 窯での焼成 literally means something like:

the firing that takes place in a kiln

or more naturally:

kiln firing / firing in a kiln

This pattern is used when a location or setting modifies a noun:

• 日本での生活 = life in Japan
• 会議での発言 = remarks made in the meeting
• 窯での焼成 = firing in a kiln

Because 焼成 is a noun, and Japanese needs の to connect the location phrase to that noun.

• 窯で焼成する = to fire something in a kiln
• 窯での焼成 = firing in a kiln

The first is a verb phrase.
The second is a noun phrase.

So if you want to say the firing in a kiln as one unit, の is needed.

焼成 is a noun, and it is also a suru-noun, meaning it can combine with する:

• 焼成 = firing, baking, calcination, kiln-firing
• 焼成する = to fire, to bake, to calcine

It is more technical and formal than everyday 焼く.

So:

• パンを焼く = bake bread
• 陶器を窯で焼成する = fire pottery in a kiln

In this sentence, 焼成 sounds specialized, the kind of word you might see in ceramics, manufacturing, or technical writing.

は marks the topic.

The topic here is 窯での焼成 — firing in a kiln.
Then the sentence says something about that topic:

窯での焼成は、時間がかかる。
As for firing in a kiln, it takes time.

So the structure is:

• [topic] は
• [comment about the topic]

This is extremely common in Japanese.

Because かかる in this sense works with が.

The pattern is:

• 時間がかかる = time is required / it takes time
• お金がかかる = money is required / it costs money
• 手間がかかる = effort is required

So in Japanese, the thing required is often marked with が.

English says it takes time, but Japanese expresses it more like:

time is involved / time is required

That is why 時間がかかる is correct.

Here, かかる means to take or to require, especially for time, money, or effort.

Common meanings of かかる include:

• to take time
• to cost money
• to require effort
• to be applied / imposed
• to hang (in other contexts)

In this sentence, it specifically means:

to take time

So 時間がかかる is a set expression you should learn as a chunk.

Yes. It functions as one noun phrase.

You can think of it like this:

• 窯での = in a kiln
• 焼成 = firing

Together:

窯での焼成 = kiln firing / firing in a kiln

Then that whole phrase becomes the topic of the sentence with は.

This kind of structure is very common in Japanese technical writing:

• 工場での生産 = production in a factory
• 海外での経験 = experience abroad
• 窯での焼成 = firing in a kiln

Yes. A more conversational version would often use 焼く instead of 焼成.

For example:

• 窯で焼くのは時間がかかる。
• 窯で焼くと時間がかかる。

These sound less technical and more like normal spoken Japanese.

The original sentence, 窯での焼成は時間がかかる, sounds more formal, written, or specialized.

Because Japanese often does not need an explicit dummy subject like English it.

English says:

• It takes time.

Japanese simply says:

• 時間がかかる

There is no need for a word corresponding to English it.
The topic 窯での焼成は already tells us what the sentence is about.

So Japanese often leaves out things that English requires.

Yes, it is natural, especially in a formal or technical context.

It sounds like something you might read in:

• a ceramics textbook
• a manufacturing explanation
• a museum or craft description
• technical writing about materials

Because of 焼成, it has a more specialized tone than ordinary daily conversation.

Those spaces are usually just for learners. Standard Japanese writing normally does not use spaces like this.

Normally, it would be written as:

窯での焼成は時間がかかる。

Teaching materials sometimes add spaces to make the parts easier to see, especially for beginners.