How much is this?

Kore wa ikura desu ka.

How much money?

Ikura desu ka?

Can I look at it?

Mite mo ii desu ka.

Where is ~?

~ wa doko ni arimasu ka.

Do you have ~?

~ (ga) arimasu ka.

Do you have ~?

~ wa ari masu ka?

Please show me ~.

~ o misete kudasai.

Please show it.

Sore wo misete kudasai.

Please show me this.

Kore wo misete kudasai.

I'll take it.

Kore ni shimasu.

I'm just looking.

Miteiru dake desu.

I want to buy ~

~ wo kai tai no desuga.

Can you give me a discount? / Can I get a discount?

Nebiki shite morae masu ka?

Can I have a receipt, please?

Ryoushuu-sho wo kudasai.

What is this?

Kore wa nan desu ka?

Which do you think is better?

Dochira ga ii to omoimasu ka.

Which one is the best among these?

Kono naka de dore ga ichiban ii kana.

What do you think is suitable?

Donna no ga ii deshou ka.

May I try this on?

Shichaku shitemo iidesu ka?

Do you have another one?

Hoka no wa ari masu ka?

I need ~.

~ ga hitsuyou desu.

I'm just looking.

Chotto mite iru dake desu

I don't want it.

Sore wa iri masen.

I'll take it.

Sore wo kudasai.

You gave me the wrong change.

O-tsuri ga machigatte imasu.
o-tsuri: change

(The money that you get back when you have paid for something with more money than it costs.)

Do you have something less expensive?

Motto yasui no wa nai desu ka?

That's too expensive.

Taka sugi masu.

This is a little expensive.

Kore wa sukoshi takai desu.

It's too expensive. I can't afford it.

Taka sugi te watashi ni wa kae masen.

I don't like this design very much.

Kono dezain wa amari suki dewa ari masen.

I don't like this color.

Kono iro wa suki dewa ari masen.

Let me think about it.

Chotto kangae sasete kudasai.

This is popular now!

Ima, kore ga ninki desu!

This is too small.

Kore wa chiisa sugi masu.

Do you have a smaller one?

Mou sukoshi chiisai no wa ari masu ka?

Do you have a bigger one?

Mou sukoshi ookii no wa ari masu ka?

Is this color too loud for me?

Kono iro watashi ni wa hade kashira.

"~ kashira" is used only by female speaker.

I wonder if this is too big for me.

Kore wa watashi ni wa ookii kana.

I prefer ~.

~ no hou ga ii n desu kedo.

I'm sorry, but some other time.

Sumimasen kedo, mata ni shimasu.

The size is not right. Can I exchange it?

Saizu ga awanai node, torikaete moraemasu ka.

I would like to return this.

Henpin shitai no desuga.

I'd like a refund, please.

Harai-modoshite hoshii no desuga.

Can I return it?

Henpin suru koto ga dekimasu ka.