hassoutuuti wo okurimasita.

It is read:

はっそうつうち を おくりました。

• 発送 = はっそう
• 通知 = つうち
• 送る = おくる → 送りました = polite past form

発送通知 is a compound noun meaning shipping notification, dispatch notice, or shipment notice.

It is made of:

• 発送 = shipping / dispatch
• 通知 = notice / notification

So together, it means the notice that tells someone an item has been shipped.

を marks the direct object of the verb.

In this sentence:

• 発送通知 = the thing being sent
• 送りました = sent

So 発送通知を送りました literally means (someone) sent the shipping notification.

送りました is the polite past form of 送る.

• 送ります = send / will send
• 送りました = sent

So this sentence reports that the action has already happened.

The subject is omitted, which is very normal in Japanese.

Depending on context, it could mean:

• I sent the shipping notification
• We sent the shipping notification
• Our company sent the shipping notification

Japanese often leaves out information that is already understood from context.

Good question. The recipient is omitted here.

If you want to say who received it, you can add に:

• お客様に発送通知を送りました。 = We sent the customer a shipping notification.

So yes, に would mark the person or place receiving it, but it is simply left out in the original sentence.

Yes, it is natural, especially in business or customer-service contexts.

It sounds like a short factual statement, such as:

• in an email
• in a support message
• in an order-management note
• in a system message

It is polite and straightforward.

Because Japanese often skips the topic when it is already clear.

A fuller version could be something like:

• こちらは発送通知を送りました。
• 当店は発送通知を送りました。

But in real Japanese, that often sounds unnecessary if the situation already makes the topic obvious. Short sentences without は are very common.

No. Standard Japanese writing normally does not use spaces between words.

So it would usually be written as:

発送通知を送りました。

Spaces are sometimes added only for learners.

Both can work, but the nuance is slightly different.

• 送る = to send
  This is broader and very common.
• 送信する = to transmit/send electronically
  This sounds more specifically like sending an email, message, or digital data.

So:

• 発送通知を送りました = we sent the shipping notification
• 発送通知を送信しました = we sent/transmitted the shipping notification electronically

If the notice was sent by email or system message, 送信しました may sound a little more precise.

Not exactly in a literal word-for-word sense, but that is close in practical meaning.

発送通知 is a set phrase meaning shipping notification. It does not usually mean a fully separate clause like a notification saying I shipped it. Instead, it works as a fixed business noun.

So the sentence is best understood as:

• sent the shipping notification
• sent a dispatch notice

Yes, it sounds fairly formal and businesslike.

In more casual speech, people might say something less technical, such as:

• 発送の連絡をしました。
  = I contacted you to let you know it was shipped.
• 発送したと連絡しました。
  = I informed you that it was shipped.

But 発送通知 is very natural in online shopping, logistics, and customer support.

The basic order here is very natural:

• 発送通知を送りました。

Japanese word order is flexible, but the verb usually comes at the end. You could move other information around if you add it, for example:

• 昨日、発送通知を送りました。
  = Yesterday, I sent the shipping notification.
• お客様に発送通知を送りました。
  = We sent the customer a shipping notification.

So the key point is that 送りました stays at the end, while other elements can move more freely depending on emphasis and context.