This blade by Norishige is Tokubetsu Juyo (one step above Juyo). Norishige is one of the most important sword smiths in the history of Japanese Swords... N.B.T.H.K stated on the Juyo narrative that the work was so similar to Masamune that you can call them the same. It is in absolutely perfect condition, even the Horimono (grooves) were done by Norishige. It is a highly recommended candidate for Juyo Bijutsuhin (next level up from Tokubetsu Juyo) but of course it would not ever leave Japan, as it would fall into the Cultural property category.