Hi,

When I align table containing japanese character as following steps:

  1. insert following table to buffer.
        | 日本語      |   |
        | foo bar baz |   |
  2. move cursor to top-left corner of table.

  3. Hit Tab, Tab

Aligning table is incorrect as following:
        | 日本語   |   |
        | foo bar baz |   |

I think, `org-table-justify-field-maybe' should use string width
instead of buffer's point distance.

I wrote attached patch to use string width. Would you review it?

Regards,
Taiki