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First, be aware that Arata sounds very close to erotic and errata. Neither of those is especially good as a name element.
Second of all, is Arata a given name in Japanese culture, and what are its connotations there? If it's strictly a surname, for instance, you will be seen as, maybe not insensitive, but definitely silly, if and when you encounter someone of Japanese culture or who is well-educated in all things Japanese.

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Also, given the history of relations between Japan and China for quite some time, it's a bit odd to think of a Chinese person deliberately giving their child a Japanese name. This probably isn't as true in the US or other places outside China or a large Chinese community, but it is something to think about.

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As to what other names you can use, well, that's up to you. You could use a Chinese name, maybe one that means the same as Arata? (Not just one that sort of sounds like it unless you are very fluent in the language.)

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Or you could use a name used popularly in the culture where you live now. It is impossible to guide you further since you've given no other parameters.

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Before you criticize a man, walk a mile in his shoes. That way, when you criticize him, you're a mile away and you have his shoes!
Steve Martin