Hi, I'm a light novel author myself, writing about 4. Along with a full novel length fantasy trilogy.
We are actually putting together a light novel magazine here to publish online, light novel authors from english speaking countries.
As for actually getting published, my two ideas, as it has never been done before, is to get your finished light novel translated into perfect Japanese, and sumbit it into the Dengenki Light Novel Contest. OR, send it to a US Publishor and demand that they publish it in both the US and JAPAN at the same time and that it be published in the normal style of a light novel.