Characters that rotate in vertical text

[Rick Cameron]

Title: Characters that rotate in vertical text

Hi, all

When Japanese (and, I imagine, other East Asian languages) is written vertically, certain characters are rotated by 90 degrees. Examples: the parenthesis-like characters in the block at U+3000, and U+30FC.

Does the Unicode character database include information on which characters are rotated in vertical text? If not, does anyone know of a definitive list?

Thanks

- rick cameron