This is a book titled 'Kotetsu Taikan Zōho Kaitei' (Comprehensive Study of Kotetsu, Revised and Enlarged Edition). It is published by the Nihon Bijutsu Token Hozon Kyokai (NBTHK) and is B4 size. The item is available for purchase.
NihontoWatch
We could not find an authenticity certificate on the seller’s listing. Japanese swords and fittings are normally papered by the NBTHK (or the NTHK). Without one, the attribution is the seller’s own assessment and has not been independently verified — treat it with caution and ask the dealer about certification before buying.
Returns must be shipped within 3 days of delivery. Excludes modified/damaged items or past the deadline. Return shipping paid by customer. Overseas orders cannot be returned/refunded.
¥55,000