okyakusama no youkyuu ha muzukasikatta.

It is read:

おきゃくさま の ようきゅう は むずかしかった。

Breakdown:

• お客様 = おきゃくさま
• の = の
• 要求 = ようきゅう
• は = は, pronounced wa here
• 難しかった = むずかしかった

A very common beginner point: the particle は is written ha but pronounced wa when it is used as a particle.

The structure is:

A の B は adjective

Here:

• お客様 = customer
• の = links customer to request
• 要求 = request/demand
• は = marks the topic
• 難しかった = was difficult

So grammatically, the sentence is talking about the customer’s request as the topic, and then describing it as difficult.

の connects two nouns.

In this sentence:

• お客様の要求 = the customer’s request

You can think of の as doing the job of ’s or of in English.

Examples:

• 先生の本 = the teacher’s book
• 日本の文化 = Japanese culture / the culture of Japan
• お客様の要求 = the customer’s request

So here, の shows that the 要求 belongs to, or is associated with, お客様.

は marks the topic of the sentence.

So お客様の要求は means something like:

• As for the customer’s request, ...

Then the sentence says what was true about that topic:

• ... it was difficult.

If you used が instead, the nuance would be a little different. が often marks the specific subject being identified or emphasized. は is more natural when you are introducing the thing you want to talk about and then making a comment about it.

For many learners, the easiest way to understand this sentence is:

• お客様の要求は = topic
• 難しかった = comment about that topic

難しい is an i-adjective, and 難しかった is its past tense.

Conjugation:

• dictionary form: 難しい = difficult
• past form: 難しかった = was difficult

This happens by changing:

• -い → -かった

So:

• 高い → 高かった
• 新しい → 新しかった
• 難しい → 難しかった

That is why the sentence ends with 難しかった.

It means the request was difficult.

The topic is:

• お客様の要求 = the customer’s request

And 難しかった describes that whole noun phrase.

So the difficult thing is 要求, not お客様.

If you wanted to say the customer was difficult, you would need a different sentence, such as one where お客様 itself is the thing being described.

お客様 is a very polite way to say customer or guest.

It has:

• お = honorific prefix
• 客 = guest / customer
• 様 = very polite honorific suffix

So compared with other forms:

• 客 = customer/guest, plain and sometimes blunt
• お客さん = polite and common
• お客様 = very polite, especially in business, service, or formal situations

This is why stores, hotels, and customer-service settings often use お客様.

It is understandable, but the nuance is important.

要求 often sounds stronger than English request. It can mean:

• demand
• requirement
• insistence

In business Japanese, depending on the context, people often use softer words like:

• 要望 = request, desire, preference
• 依頼 = request, asking someone to do something

So while お客様の要求 is grammatically fine, it may sound like the customer’s demand or a fairly strong request.

If the intended meaning is a softer customer request, お客様の要望 might sound more natural in some situations.

Yes. Japanese nouns usually do not show singular/plural the way English does.

So お客様 can mean:

• customer
• customers

The same is true for 要求:

• request
• requests

The exact number is usually understood from context.

So this sentence could refer to:

• one customer’s one request
• one customer’s several requests
• customers’ requests

But in many contexts, people will naturally interpret it as singular unless something suggests otherwise.

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

The usual writing would be:

お客様の要求は難しかった。

Spaces are often added in teaching materials to help beginners see the parts more clearly:

• お客様
• の
• 要求
• は
• 難しかった

So the spaces are just a learning aid.

Yes. You could say:

お客様の要求は難しかったです。

That makes the sentence sound more polite.

Compare:

• 難しかった。 = plain style
• 難しかったです。 = polite style

The original sentence mixes a very polite noun phrase (お客様) with a plain sentence ending (難しかった). That can happen, especially when talking about a customer respectfully while still speaking in plain style overall.

So the original is not impossible, but in formal customer-service speech, 難しかったです may sound more consistent.

Yes, but the level of politeness changes.

Compare:

• お客様 = more formal, more respectful
• お客さん = polite and common, but less formal

So:

• お客様の要求は難しかった。
• お客さんの要求は難しかった。

Both are grammatical, but the first sounds more businesslike or respectful.

It is grammatically natural, but the word choice may feel a little strong because of 要求.

If the speaker really means a demand or a strong requirement, then 要求 fits well.

If the speaker means a more ordinary customer request, Japanese often prefers softer expressions such as:

• お客様の要望は難しかった。
• お客様からのご要望への対応は難しかった。

So the grammar is fine, but the exact naturalness depends on the situation and the nuance you want.

Yes. Depending on context, 難しい can mean things like:

• difficult
• hard
• complicated
• not easy to handle
• problematic

So in this sentence, 難しかった could mean:

• the request was hard to fulfill
• the demand was complicated
• it was difficult to deal with that request

Japanese adjectives often cover a range of meanings, and context decides the most natural English translation.

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

This sentence simply says that the customer’s request was difficult. It does not explicitly say:

• difficult for whom
• difficult to do what
• difficult in what way

The listener is expected to infer that from the situation, for example:

• difficult for the staff to handle
• difficult for the company to meet
• difficult to understand or satisfy

This kind of omission is very common in Japanese.

Here is the breakdown:

• お客様 = noun
• の = particle
• 要求 = noun
• は = particle
• 難しかった = i-adjective in past form

So the sentence is basically:

• noun + particle + noun + particle + adjective

This is a very common Japanese sentence pattern, and learning to recognize it will help with many other sentences too.