Although this may not be directly applicable, I did a search for "Ogata Korin miniatures", and got this re: Netsuke (pdf screenshot attached), from "Inro and Other Miniature Forms" by Melvin Jahss with Rakuten Kobo (https://www.kobo.com/ww/en/ebook/inro-other-min-forms):

https://books.google.com/books?id=qDDRAgAAQBAJ&pg=PP367&lpg=PP367&dq=Ogata+Kōrin+miniatures&source=bl&ots=wtHcJXrgSd&sig=sQsC8U-lI01V7YQmL_AaTKykXuI&hl=en&sa=X&ved=0ahUKEwifsqKlpfPYAhUBVK0KHXPQChIQ6AEIXjAO#v=onepage&q=Ogata%20Kōrin%20miniatures&f=false

The passage is in the section: "History of Netsuke", starting three pages previous.

Also see this page (first of two pages, also attached), in section listing/describing all the artists discussed in the book:

https://books.google.com/books?id=qDDRAgAAQBAJ&pg=PP367&lpg=PP367&dq=Ogata+Kōrin+miniatures&source=bl&ots=wtHcJXrgSd&sig=sQsC8U-lI01V7YQmL_AaTKykXuI&hl=en&sa=X&ved=0ahUKEwifsqKlpfPYAhUBVK0KHXPQChIQ6AEIXjAO#v=onepage&q=Ogata%20Kōrin%20&f=false