Language problems

I have listed a site to be registered and I am not sure if it was in the best location. The main website is an international school in Japan(http://www.smis.org). This is in English. However, I ideally wanted to submit the Japanese part of this site related to the Night School English lessons (http://www.smis.org/night.html). Which would mean submitting the site in language schools - world - Japan. ?????
Which is the best category and can it be changed even though I have already submitted the site?

Sites in more than one language can be submitted to each language. So don't worry about your English submission and submit the Japanese part to a category within http://dmoz.org/World/Japanese/

I think the category you want is http://dmoz.org/World/Japanese/各種資料/教育/語学学習・留学/語学学校/英語/ - but you might want to double check. I can't read Japanese.