Vintage Japanese folding book set, Shōwa period, 1931, kana calligraphy, 5 volumes

Japanese book set.
Title: Kokin Wakashū preface (kana preface).
Calligraphy model attributed to Katō Chikage (Tachibana Chikage).
Shōwa period, 1931.
Five separate folding-book volumes (orihon format), complete set, with original cloth storage case.

This five-volume set represents a classical calligraphy model of the kana preface to Kokin Wakashū, traditionally used for the study and transmission of Japanese kana script.
The orihon (folding book) format allowed the text to be fully opened and laid flat, making it suitable for calligraphic practice and close visual reference rather than conventional reading.
The multi-volume structure and original storage case reflect its intended use as a sustained study set rather than a single bound book.

Print type: woodblock print.
Volumes: separate set of 5 volumes.
Format: orihon (traditional Japanese folding book).
Size (approx.): 8 × 23 × 9.2 cm (case).
Condition: Very good vintage condition. Vintage works may show natural signs of age (light toning, small fiber creases, gentle edge wear), so please review the photos carefully.
Shipping: Safe and tracked shipping from Latvia.
Free shipping for each additional book in one order. Applied in the cart and at checkout. Protective packaging.

For US buyers: this item enters the United States duty-free.