Check out the Kitazawa Seed Company (see link below). They specialize in only Asian vegetables & if they don't carry what you are looking for, they will help you find it.

Regardless of the variety, you shouldn't have any trouble growing virtually any type of bean in South Carolina. Certain varieties may not produce abundantly in extreme heat, but will pick up again when things cool down a little. At the very least, seed is relatively cheap & it's certainly worth a try.

Here is a link that might be useful: Kitazawa Seed Company

sounds like sword bean or hyacinth bean

Thank you for the responses. Although I couldn't find the bean I mentioned in the original post, I do find something else that I want. I think one reason that this bean is hard to find in US might be that most Chinese here are from South China, and they brought with them also the vegetables from the South.