tenkasu wo kizi ni ireru.

天かす is read てんかす (tenkasu).

It refers to the small crispy bits of fried tempura batter. In cooking, they are often added to things like batter, noodles, or rice for texture and flavor.

You may also hear 揚げ玉 (あげだま) used for the same thing.

Here, 生地 is read きじ (kiji).

In this sentence, it means dough or batter, depending on the recipe.

This is a good word to watch out for because 生地 can have other readings in other contexts, but in cooking, きじ is the common reading.

を marks the direct object of the verb.

So in 天かすを生地に入れる, the thing being put in is 天かす.

A simple breakdown is:

• 天かすを = the tempura bits
• 生地に = into the batter/dough
• 入れる = put in / add

So を shows what is being added.

に marks the destination or target location of the action.

With 入れる, に often shows the place something is put into.

So:

• 生地に入れる = put into the batter

You can think of it as similar to into in English.

This is very natural with verbs of putting, placing, entering, and adding.

Because 入れる is the transitive verb, meaning to put in or to add something.

• 入れる = to put something in
• 入る = to go in / to enter

In this sentence, someone is actively adding 天かす to the batter, so the transitive verb is needed.

Compare:

• 天かすを生地に入れる。
  = Add tempura bits to the batter.

• 天かすが生地に入る。
  = The tempura bits go into the batter / end up in the batter.

The first sounds like an instruction or action done by someone. The second describes the tempura bits entering or being in that state.

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

In a recipe, the subject is usually understood to be:

• you
• the cook
• or an implied instruction like next, add...

So 天かすを生地に入れる。 naturally means something like:

• Add tempura bits to the batter.
• Put the tempura bits into the batter.

Japanese does this a lot, especially in instructions, recipes, and casual speech.

入れる is in the dictionary form (plain non-past form).

In a recipe, this form is commonly used to list steps. It does not necessarily sound casual or rude here; it is just a standard instructional style.

So in this context, it works like:

• Add tempura bits to the batter.

It is not the direct command form. The command form would be stronger and less typical for recipe writing.

The basic order here is very natural:

• 天かすを 生地に 入れる

Japanese is generally a verb-final language, so the verb usually stays at the end.

The other parts can sometimes move around because the particles show their roles. For example:

• 生地に天かすを入れる。

This means the same thing and is also natural.

What matters most is the particles:

• を marks what is added
• に marks where it goes

So the sentence is flexible, but the original order is very straightforward and common.

Usually, に is better here.

With 入れる, に is the normal particle for the place or container something is put into:

• 生地に入れる

Using へ would sound less natural in this case, because へ mainly emphasizes direction, while に works better for a concrete destination or result location, especially with putting something into something.

So for learners, the safest choice is:

• X を Y に 入れる

No—standard Japanese normally does not use spaces between words.

The normal written sentence would be:

天かすを生地に入れる。

Spaces are often added in teaching materials to make it easier for learners to see the word boundaries.

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

It can mean either, depending on the food being made.

生地 is a general cooking word for an uncooked mixture such as:

• batter
• dough
• pastry base

In this sentence, the best English translation depends on the recipe context. If the mixture is pourable, batter is more natural. If it is thicker and kneaded, dough may fit better.

So the Japanese is broad, and English becomes more specific depending on the dish.