higaerinyuuyoku ga dekiru.

It is read:

ひがえりにゅうよく が できる

Breakdown:

• 日帰り = ひがえり = a day trip / returning the same day
• 入浴 = にゅうよく = bathing
• できる = can do / is possible

A useful reading note:

• 帰り is normally かえり, but in compounds it often becomes がえり, so 日帰り is ひがえり.

日帰り入浴 is a compound noun meaning something like:

• day-use bathing
• drop-in bathing
• using the bath without staying overnight

This is very common in the context of:

• hot springs
• public baths
• inns or hotels with baths

So it usually means you can come in, use the bath, and leave the same day, without booking a room.

This is a very common question.

With できる, Japanese often marks the thing that is possible with が.

So:

• 日帰り入浴ができる = day-use bathing is possible

This is different from a basic action sentence like:

• 日帰り入浴をする = to do day-use bathing

When you switch to できる, the thing that can be done is often marked by が.

So ができる is the most standard pattern here.

Yes.

する = to do
できる = can do / be able to do

Since 入浴 is a verbal noun, you can think of the full idea as:

• 入浴する = to bathe
• 入浴ができる = can bathe / bathing is possible

In this sentence, it is not really talking about personal skill, like I am able to do this. It more often means:

• it is available
• it is allowed
• the facility offers it

So here できる sounds more like is possible / is offered than have the ability to.

Because Japanese often uses the shorter pattern:

noun + が + できる

instead of the longer:

verb / verbal noun + することができる

So these are related:

• 日帰り入浴ができる
• 日帰りで入浴することができる

The first one is much shorter and very natural on signs, websites, and facility descriptions.

So even though 入浴 can go with する, it does not need する here.

Very literally, it says:

Day-use bathing is possible.

That is the grammar-shaped meaning.

But in natural English, depending on context, you would usually say something like:

• Day-use bathing is available.
• You can use the bath for the day.
• Drop-in bathing is available.
• You can bathe here without staying overnight.

So the literal structure is a little different from the most natural English translation.

Yes. Very likely.

Japanese often leaves out the topic or subject when it is obvious from context. In a sign or advertisement, this sentence probably implies something like:

• この温泉では、日帰り入浴ができる。
  • At this hot spring, day-use bathing is available.
• この旅館は、日帰り入浴ができる。
  • This inn offers day-use bathing.
• ここでは、日帰り入浴ができる。
  • You can do day-use bathing here.

So the sentence by itself is short because the place is understood already.

In this sentence, it most naturally means availability or possibility in that setting.

It is not mainly about personal ability, like:

• I can swim
• I can speak Japanese

Instead, it means something closer to:

• it is possible here
• the facility allows/offers this
• this service is available

So in context, 日帰り入浴ができる usually means:

• This place offers day-use bathing rather than
• Someone has the ability to do day-use bathing

Because short descriptions, signs, ads, and listings often use plain form.

Compare:

• 日帰り入浴ができる。 = plain, concise, descriptive
• 日帰り入浴ができます。 = polite, customer-facing sentence

Both are correct. The plain form is very common in:

• brochures
• websites
• bullet points
• travel guides
• signs

So this does not sound rude by itself; it just sounds like a brief written description.

Yes.

A plain-form clause like 日帰り入浴ができる can modify a noun:

• 日帰り入浴ができる温泉
  • a hot spring where day-use bathing is available
• 日帰り入浴ができる旅館
  • an inn that offers day-use bathing

This is one reason plain form appears so often in descriptions: it works well both as a full statement and as a noun modifier.

Because できる is very commonly written in hiragana in modern Japanese.

Although 出来る exists, hiragana is usually preferred for this verb in everyday writing. It looks more natural and is easier to read.

So:

• できる = standard and very common
• 出来る = possible, but less common in ordinary writing

For learners, it is best to get used to seeing できる in hiragana.