You could try e-mailing Ryojusen Pens to see if he has any info. [Not to make my first post here a suggestion to go elsewhere--but that guy seems like he'd know, if anyone does.] Tho it's probably one of those Japanese pen companies who (it seems) have no real history. Or little that'll lead you anywhere, i guess.
Nice find (and a pretty pen), by the way.
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