いつか日本でコンサートをしてほしいです。って英語でなんて言うの？

The two sentences you see provided above are great ways to express to your favorite artist or performer that you hope they will have a concert in Japan someday. In the second sentence you will see the verb hold. This means to have or organize. This word is appropriate for both formal and informal settings, it would make an awesome addition to your vocabulary.

I wish you would come and perform in Japan. I hope you perform in Japan. Are ways to tell your favourite band that you hope they perform in Japan.

Native speakers will say like this: “Please come to perform in Japan”. There are lots of other ways to say it, but this one is the most accurate and most commonly used. - You're my favorite artist! Please come to Japan! - I'd love to see you live! Please come to perform in Japan!

If you want someone to do something, but you are not sure if it will ever happen, you can use the word "hope" to express your desire. If you want to show how passionate you are at the prospect of something happening, you can use the word "love" but preface it with "would" to show that you know it is not definitely going to happen! For Example, "I would be so happy if you came here" / "I would be sad if you never performed here."

The most casual way to talk about a concert is to 'play (music)', as in the first example. You could express your desire to see a musical performance by saying that you 'hope' to see them 'perform'. The specific phrase for performing concerts abroad is 'to go on tour', as in the final example.