I would like to introduce Markus Sesko to all those interested in Japanese swords who might not have run across his wonderful blog on Nihonto yet. You need to check it out: https://markussesko.com/ . His translations of current and historical references, including the NBTHK Juyo publications, with continuing updates on kantei, and his histories of the Koto, Shinto, and Shinshinto smiths are invaluable. He is currently working on a translation of Ito Mitsuru's series of articles on Nobuie in the magazine Towa, on a subscription basis (I am a subscriber). My shelf of references by Markus is currently over a foot long and growing. I cannot recommend his site and his publications too highly. We have corresponded, and i look forward to meeting him at one of the sword shows soon, perhaps in San Francisco this summer.