True words ( as always ) from Arnold. The first CATALOGUE OF 150 EXELLENT SWORDS shows more than 30 shinshinto blades.
Darcy said in an older thread the Nbthk gives only , about 4 % juyo attribution to shin shinto blades, almost the big five smiths involved.
So if you collect... Grey Doffin sells the NTHK catalogues, I think the first one, translation inclusive for only 80 $.
Best Regards