A prominent composer lost his Wikipedia page

The Spanish dubs used the original Japanese soundtrack afaik.

Think of it like code in an active open-source project. Someone needs to maintain the article: update it when house style changes, evaluate any new contributions to it as being valid or not, etc. Like code experiencing code-rot, a Wikipedia article rots if editors don't give it active attention.

This has exactly the implications you'd expect: it means that articles about things that don't change, are easier to keep around than are articles about things that might change; which are in turn easier to keep around than are articles about things that definitely will change.

Living people — where the article is basically living biography for them — are in that last category.

The "notability" requirement can be translated into editor-ese as a combination of 1. "how many people could we find who could contribute to this page", and 2. "how much demand is there for Wikipedia — rather than some other website — to do the work of keeping this."

Re: the first point about contribution, this is why Wikipedia doesn't let people be their own primary source — it's because, when that primary-source person eventually stops maintaining the page, who will then be able to take over the maintenance? If that's "nobody", then to prevent that, the page shouldn't be allowed in the first place.

Re: the second point about demand — the Pokemon Pikachu has its own Wikipedia page, because people expect Wikipedia specifically to have an article about Pikachu. Other Pokemon do not — because there's already Bulbapedia around to satisfy the demand for an encyclopedia with articles about Pokemon, and the pages from it are easily found in any search engine. If a different set of editors are willing to take on the maintenance burden for those articles in their own domain — and are doing a decent job of it — then why should Wikipedia's editors duplicate that effort?

That is very explicitly not a goal of Wikipedia. Of course you're free to disagree with what Wikipedia ought to be, but they're at least fairly clear and explicit about their own goals.

From the info I have, the only criteria he may meet is #1 for in the first group, and it is not actually clear that "soundtrack for DBZ" is a notable composition. for a TV show soundtrack to qualify as notable, it would need to be something often written about. For example, if a show is discussed for its music almost as often as for its plot, then sure the soundtrack is probably notable. I don't think that actually applies here.

And even if so, if he is only really known for one work (which pretty much is the case), that would generally be merged with the article for that work. So he could be mentioned in the "Sound Track of DBZ" article if one existed, or the "soundtrack" section of the main DBZ article.

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Composers, songwriters, librettists or lyricists, may be notable if they meet at least one of the following criteria:

1. Has credit for writing or co-writing either lyrics or music for a notable composition. 2. Has written musical theatre of some sort (includes musicals, operas, etc.) that was performed in a notable theatre that had a reasonable run, as such things are judged in their particular situation, context, and time. 3. Has had a work used as the basis for a later composition by a songwriter, composer or lyricist who meets the above criteria. 4. Has written a composition that has won (or in some cases been given a second or other place) in a major music competition not established expressly for newcomers. 5. Has been listed as a major influence or teacher of a composer, songwriter or lyricist that meets the above criteria. 6. Appears at reasonable length in standard reference books on their genre of music.

Where possible, composers or lyricists with insufficient verifiable material to warrant a reasonably detailed article should be merged into the article about their work. When a composer or lyricist is known for multiple works, such a merger may not be possible.

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Composers and performers outside mass media traditions may be notable if they meet at least one of the following criteria:

1. Is frequently covered in publications devoted to a notable music sub-culture.

2. Has composed a number of notable melodies, tunes or standards used in a notable music genre.

3. Is cited in reliable sources as being influential in style, technique, repertory or teaching for a particular music genre.

4. Is cited by reliable sources as having established a tradition or school in a particular music genre.

5. Has been listed as a significant musical influence on musicians or composers who meet the above criteria.