For serious design work I would like to recommend the people at Resourcecode.com. The principal is a Mr. Jade Carter. Jade’s first language is English but he lived in Japan for more than 10 years and is completely fluent in Japanese. He also has his English/Japanese translators certification (highest level). As you can see communicating with him is not a problem.
He has won numerous awards including one from Cannes for best web film.
He also understands IDN’s and owns many himself.
You can get in touch with them at
info@resourcecode.com