The word “kurui” is not easy to interpret, even for Japanese. Sometimes it is falsely translated into English as “madness” or “craziness.” The actual meaning is more like “a frantically, rich and proud blossoming of flowers” and the word expresses a splendour which far excelled that of ordinary work. To us the style of Masamune means both superior strength and a severe beauty.
— Nobuo Ogasawara, sword curator, Tokyo National Museum
I think those words are amongst the best I have encountered amongst descriptions of the work of Masamune.
Most people will not have seen his work other than in photos, and fewer still will get a chance to have one in their hands.
In my own attempts, from what I’ve been lucky to hold, I have said that the best Masamune work is like a raging storm at sea. Shintogo appears to me like clear, cold ice. Sadamune as sunrise on a summer morning with dew on the grass.
If I wrote more, it would mean less.