Ok, i was more based on a couple of anime i saw where a character named Koichi went by Hikaru during a cross dressing joke...
Its one of those " if i had a penny for every time it happened, i'd have 2 pennies, its weird that it happened twice..."
That or it was the same 1 anime repeating the joke and i just forgot.
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Its Murasaki Shikibu's magnum opus. Genji Monogatari: Aoi Mononoke is her NP name.
And that just the TM bent, it gets referenced often enough in anime.