bouringubooru ga reen no gataa ni haitta.

You’re right: normal Japanese is usually written without spaces.

So the standard way to write this would be:

ボウリングボールがレーンのガターに入った。

The spaces here are just for learners, to help show the parts of the sentence:

• ボウリングボール = bowling ball
• が = subject marker
• レーンのガター = the lane’s gutter / the gutter of the lane
• に = into / in / to
• 入った = entered / went in

Katakana is often used for loanwords, especially words borrowed from English and other foreign languages.

In this sentence:

• ボウリングボール = bowling ball
• レーン = lane
• ガター = gutter

These are all borrowed sports terms, so katakana is natural.

A learner should also know that katakana words are often Japanese approximations of foreign pronunciation, not exact copies of English sounds.

が marks the grammatical subject of the sentence.

So in:

ボウリングボールがレーンのガターに入った。

the subject is ボウリングボール.

A natural way to think about it is:

• As for what entered the gutter? → the bowling ball

Here, が is appropriate because it simply identifies what did the action of entering.

Both can be possible in different contexts, but they do slightly different things.

• が identifies the subject more directly.
• は marks the topic and often gives a contrastive or broader-context feeling.

So:

• ボウリングボールがレーンのガターに入った。
  = The bowling ball went into the lane’s gutter.
  This sounds like a straightforward statement of what happened.

If you said:

• ボウリングボールはレーンのガターに入った。

it would feel more like As for the bowling ball, it went into the gutter, perhaps contrasting it with something else, like another ball.

For a simple neutral description of an event, が is very natural.

の links nouns together. It often works like:

• ’s
• of
• a noun modifier

So レーンのガター literally means something like:

• the lane’s gutter
• the gutter of the lane

In smoother English, we would usually just say the gutter of the lane or simply the gutter.

Here, の shows that the gutter belongs to or is associated with the lane.

に marks the destination or result location of motion with verbs like 入る.

So:

• ガターに入った = went into the gutter / entered the gutter

With 入る, the place entered is commonly marked by に.

That is why に is the natural particle here.

入った is the past form of 入る.

• dictionary form: 入る = to enter, to go in
• past form: 入った = entered, went in

This is a godan verb, so 入る changes to 入った in the plain past tense.

So the sentence is describing something that already happened.

Because 入る and 入れる are different verbs.

• 入る = to enter / to go in
  
  • intransitive
• 入れる = to put in / to insert
  
  • transitive

In this sentence, the bowling ball itself is moving into the gutter, so the intransitive verb 入る is the right choice.

If someone put something into something else, you would use 入れる instead.

Yes, depending on the nuance.

• 入った focuses on the ball going into the gutter.
• 落ちた focuses on the ball falling into the gutter.

So:

• ガターに入った = it went into the gutter
• ガターに落ちた = it fell into the gutter

In bowling, both can make sense, but they emphasize slightly different things.
入った is more neutral about the result; 落ちた highlights the downward or accidental feel.

It is understandable, but many Japanese speakers are more likely to say ガター in bowling contexts as part of expressions like:

• ガターになる = to end up in the gutter
• ガターに落ちる = to fall into the gutter

Also, in real-life bowling talk, you may hear set phrases rather than a full descriptive sentence like this.

So the sentence is grammatical and understandable, but depending on context, native speakers might phrase the event a little differently.

Japanese often puts information in this kind of order:

subject + place/destination + verb

So here:

• ボウリングボール = subject
• レーンのガターに = destination/location entered
• 入った = verb

The verb usually comes near the end of the sentence in Japanese.

That’s why the sentence structure feels different from English, even though the meaning is the same.

Not necessarily. Japanese nouns usually do not show singular vs. plural unless the speaker makes it clear in some other way.

So ガター here can be understood from context as:

• the gutter
• one of the gutters
• the lane’s gutter area

In bowling, each lane has gutters on the sides, but Japanese often leaves that kind of detail to context instead of marking it explicitly.

Yes. Japanese often omits subjects when they are clear from context.

So if everyone already knows you are talking about the bowling ball, you might hear something like:

レーンのガターに入った。

That would still be understood as It went into the lane’s gutter or The bowling ball went into the gutter, depending on context.

Japanese very often leaves out information that English usually states directly.