Google has aggressively patched many dorks. For better results with this specific query, try:
This is the most critical section of this article. Just because a directory is publicly accessible does not mean it is legal to download from.
Avoid clicking on any links or downloading any files from sites that appear as simple file lists ( [ICO] Name Last modified Size Description
The internet is filled with vast amounts of content, including adult material. When searching for specific types of content, such as "intitle index of wmv japanese porn extra quality," users are often looking for high-quality media in a specific format (WMV) and genre (Japanese adult content).
—server folders that have been left publicly accessible without a standard landing page. intitle:index.of