The Ningyo-do Bunko Database is a huge online collection of watercolor paintings by Kawasaki Kyosen (1877-1942). The collection consists of over 5,000 still-life images of antique toys and folk crafts from across Japan, including a few lovely octopus-themed items.

Vintage octopus toy illustration by Kawasaki Kyosen --
Papercraft octopus, Osaka

Vintage octopus toy illustration by Kawasaki Kyosen --
Paper octopus balloon (1930)

Vintage octopus toy illustration by Kawasaki Kyosen --
"Hanamaki" clay doll octopus and child, Iwate prefecture

Vintage octopus-themed toy illustration --
Top: Roly-poly toy // Bottom: Bell/whistle (both from Aichi prefecture, 1932)

Vintage octopus toy illustration by Kawasaki Kyosen --
Sesame seed roaster (with eyeball that pops out)

Vintage octopus toy illustration by Kawasaki Kyosen --
Octopus pot/whistle, Aichi prefecture (1933)

Vintage octopus toy illustration by Kawasaki Kyosen --
Dancing octopus papier-mache doll from Kameido Tenjin Shrine, Tokyo

Vintage octopus toy illustration by Kawasaki Kyosen --
Octopus bell

Vintage octopus toy illustration --
Octopus kite, Niigata prefecture (1932)

Vintage octopus toy illustration by Kawasaki Kyosen --
"Hanamaki" clay doll octopus, Iwate prefecture (1923)

The collection is organized into 60 galleries (Japanese only) that can be navigated by clicking the thumbnail images and arrows.

[Link: Ningyo-do Bunko Database via BibliOdyssey]