Six blades from a single Edo period workshop working in the Mino tradition out of Seki, none of them signed. The smith is known to us as Kanetsugu, a name recorded in a single surviving order ledger rather than on any nakago in this line. Workshop attribution of this kind is common for commissioned sets and is treated here with the same caution the site applies everywhere: stated plainly, not oversold.
What ties the six together is not the blade alone but the commission. A single patron ordered six mountings from one koshirae atelier, varying only the saya lacquer, the ito wrap and the fittings, and the blades were matched to that set by length and geometry rather than by any single forging date. The result reads as a line rather than six unrelated pieces, which is why it is catalogued together.