Information on a topic can be found using a search engine, e.g. Google
Information (mainly credit data) on most of the anime TV series in existence can be found at: Richard Llewellyn's Animated Divots. If you have trouble matching the name you know with the name listed, a Google search may help.
Information on a TV series with literary associations (e.g. the World Masterpiece Theatre (meisaku) series) may be found at: Ben Ettinger's Sub Rosa
Please note that the first character of the Japanese name, together with the date of first broadcast, acts as an unique identifier for almost all TV series. This may help you find the entry in a Japanese list.
A few of the entries use Japanese text display for the "Japanese name". If you can't read it, it will be for one of the following reasons:
Your browser doesn't have Japanese fonts installed (usually MS Gothic)
Japanese encoding is not enabled in your browser.
That entry is corrupt or missing.
I have found that MS Internet Explorer gives the most consistent results in displaying the fonts as I intended.
The data is from various sources.
Entries are revised occasionally as additional data is found. Recent entries concentrate on shoujo titles and my personal viewing.