This is a printing woodblock with a fish design.
This sort of designs is often used for old writings (Kohitsu) like ‘Iseshū in Nishi-honganji-bon Sanjyū-rokunin-kashū’. (The Honganji Anthology of Thirty-six Poets)

This is a printing woodblock with designs of strawberry grass.
This sort of design is used for Gen’ei-bon Kokin-wakashū and Nishi-honganji Sanjū rokunin-kashū. (The Gen’ei Collection of Poems of ancient and Modern Times and The Honganji Collection of Thirty-six Poets).

This is a woodblock with designs of Chrysanthemum grass.
It is used for Decchōbon Wakan-rōeishū. (Poetry Anthology)

This is a woodblock with a design of a Tang Chinese boy grass.
The design is used for Gen’ei-bon Kokinshū. (Imperial Poetry Anthology)

This is a woodblock with a design of Hanadasuki (Flower sash).
It is used on Sunshōan Shikishi (square piece of high-quality paperboard) or for Gen’eibon Kokinshū (Imperial Poetry Anthology).

This is a woodblock with a design of a phoenix. The phoenix is surrounded by a circle with the design of Tang grass.
This design is used for ‘Ise-shū’ in Nishi-Honganji Sanjūrokunin-shū. (The Honganji Anthology of Thirty-six Poets)

Besides these woodblocks there are many other sorts of woodblocks.