For those interested in the theme hyoutan-namazu:
By the late Muromachi period, namazu had become firmly associated with unrest and upheaval, though not specifically with earthquakes. Around 1413, the shōgun, Ashikaga Yoshimochi, commissioned the artist Josetsu to produce a now famous painting loosely connected with the Zen Buddhist idea that one's mind cannot be grasped. A group of Zen priests close to the shōgun then added a series of poems to the painting. The result was *Hyōnenzu* 瓢鮎図, which means literally "Illustration of catching a namazu (鮎 in this case, not the usual 鯰) with a gourd."
This complex painting features, in the foreground, a *ragged looking man* trying to catch or hold down a catfish with a smooth bottle gourd. The namazu has moved into relatively open water and is about to enter a wide area overgrown with weeds. Catching it or pinning it down with a gourd seems to be impossible, and, indeed, today the image of pinning down a catfish with a gourd is a well-establish metaphor for doing the impossible. At the time the painting was created, however, the range of possible meanings of its rich symbolism was quite wide, and interpreting this painting thoroughly requires a book-length study (and there is one: Shimao Arata 島尾新, Josetsu-hitsu hyōnenzu: hyōtan-namazu no ikonorojii 『如拙筆、瓢鮎図:ひょうたんなまずのイコノロジー』, [Tokyo]). Here is the key point to bear in mind for our purposes: Hyōnenzu is the earliest known example of the image of pinning down a catfish with a gourd or other object.