heya ni syuunoukago wo oku.

• 部屋（へや） = room
• に = a particle marking the place where something is put
• 収納かご（しゅうのうかご） = storage basket / storage bin
• を = a particle marking the direct object
• 置く（おく） = to put, place, set down

So the sentence structure is basically:

room + in/into + storage basket + object marker + put

に is used because 置く is a verb that often marks the location of placement with に.

So in this sentence:

• 部屋に = in the room / into the room

It tells you where the basket is being placed.

This is different from を, which marks what is being placed.

Because 収納かご is the thing being acted on by the verb 置く.

In other words:

• 収納かごを置く = place the storage basket

The particle を marks the direct object, so it answers the question what is being placed?

Japanese sentences normally put the verb at the end.

So the basic word order here is:

place + where + object + verb

More naturally in English terms:

• 部屋に = in the room
• 収納かごを = the storage basket
• 置く = put

Japanese often follows a topic/setting + object + verb pattern, with the verb coming last.

置く is the plain dictionary form of the verb.

This form is commonly used for:

• dictionary entries
• simple statements in casual style
• captions, labels, or instructions
• describing an action in a neutral way

Depending on context, it could mean things like:

• put
• place
• to put
• to place

If you wanted a polite form, it would be:

• 部屋に収納かごを置きます。

It can feel like either one depending on context.

With 置く, に marks the destination/location where something ends up being placed. So in English, you might translate it as:

• put a storage basket in the room
• place a storage basket into the room

In most natural English translations, in the room sounds better.

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

So 部屋に収納かごを置く could mean:

• I put a storage basket in the room
• You put a storage basket in the room
• to put a storage basket in the room

The subject is omitted because Japanese does not need to state it every time if the listener can understand it from the situation.

Yes, it is understandable and natural, especially in home, furniture, or organizing contexts.

It is made of:

• 収納 = storage
• かご = basket

So 収納かご means a basket used for storage.

Depending on context, Japanese might also use:

• かご = basket
• 収納ボックス = storage box
• バスケット = basket

The exact choice depends on the shape and style of the container.

It is read:

しゅうのうかご

So the full sentence is read:

へや に しゅうのうかご を おく

The particle を is traditionally written with the character を, but in modern Japanese it is usually pronounced お.

So in this sentence:

• 収納かごを置く

the を sounds like o.

This is just a standard spelling rule for the object marker particle.

Yes. That is also natural.

Both of these are possible:

• 部屋に収納かごを置く
• 収納かごを部屋に置く

The core meaning stays the same.

The difference is mostly about emphasis or flow:

• 部屋に収納かごを置く puts the location first
• 収納かごを部屋に置く puts the object first

Japanese word order is somewhat flexible as long as the particles make the roles clear.

This is a very common question.

• 置く = to place / set down
• 入れる = to put into / insert

So:

• 部屋に収納かごを置く = place a storage basket in the room
• 部屋に収納かごを入れる would sound strange in most situations, because it suggests putting the basket into the inside of the room as if the room were a container

For furniture or objects being placed somewhere, 置く is the normal choice.

Japanese does not use articles the way English does.

So 収納かご could mean:

• a storage basket
• the storage basket
• storage baskets in some contexts

The exact meaning depends on context.

English forces you to choose a or the, but Japanese often leaves that unspecified unless it matters.

A few common options are:

• 部屋に収納かごを置いて。 = Put the storage basket in the room.
• 部屋に収納かごを置いてください。 = Please put the storage basket in the room.
• 部屋に収納かごを置け。 = Put the storage basket in the room.
  This is strong and rough, so be careful with it.

The original 置く by itself is just the plain dictionary form, not a command by default.