"What about Kunisada?" asks the Utagawa Kunisada (Toyokuni III) Project, and continues:

The question isn't already answered. There is still a lot of questionmarks to the ouevre of one of the most prolific Japanese Ukiyo-e artists. So the idea has been growing that it should be necessary first to collect his huge work in a catalogue and then some more answers can be given.

And collect his huge work in a catalogue Horst Graebner has. Modernism lives!