He did so inspired by Oda Nobunaga, whose Azuchi Castle was designed as a lavish residence, but he also wanted to surpass Nobunaga's castle in every aspect. As a result, the Osaka Castle, a truly impressive, five stories tall construction was finished in 1585, and since Hideyoshi was fascinated by gold, large gold leaf decorations were applied on the main tower.
Today, the decorations are reproduced on the reconstructed castle, and the entire scene is fascinating when seen from the nearby garden...
EXIF info:
Nikon D700
Lens: 24-70mm F/2.8G
Focal Length: 48mm
Aperture: F/7.1
Shutter Speed: 1/125s
ISO Sensitivity: ISO 400