It's no hijacking, not at all! Just in contrary. It's helpful (not only for myself I hope) to recapitulate what I'm really interested in, and what's my intention in collecting and studying Nihonto. It's not for the plain value of an object of art. When I observe my feelings there are a few works which always seem to talk to me: from the Koto period Ko-Mihara, Enju, Gassan, from Shinto times Hizen Tadayoshi and Kanemichi (Michina). It's not easy to answer why these talk to me and others don't. And though on one hand I could imagine to build up a small Koto collection with just one exemplary work from each of the five main streams of the Gokaden, on the other hand that feels a bit to academic – in the way that a strict concept like this would outrule lots and lots of involving works waiting for discovery. But isn't exactly that the quintessence of each passion – curiosity?
just my five cents