This was because he and his daughter Oi (Oi KATSUSHIKA), who had divorced and lived with her father Hokusai, devoted themselves exclusively to painting, so that they moved whenever their rooms became dirty or in wild disarray.
これは、彼自身と、離縁して父・北斎のもとにあった出戻り娘の応為（おうい。葛飾応為）とが、絵を描くことのみに集中し、部屋が荒れたり汚れたりするたびに引っ越していたからである。