The story is somehow similar to the Old Shatterhand Western story by Karl May, because Matsukaze was a fine but wild horse, refusing to let anyone ride him. Maeda Keiji, who was also a wild man, managed to tame Matsukaze and, man and horse, they fought many battles together. After the samurai's death, Matsukaze run into the wild and was never seen again...
Here they are, represented on a spectacularly iluminated Nebuta float, inside the Warasse Nebuta Museum, in Aomori.
EXIF info:
Nikon D700
Lens: 35mm F/2D
Focal Length: 35mm
Aperture: F/2.8
Shutter Speed: 1/80s
ISO Sensitivity: ISO 1000