Initially there were 11 types of "traditional" kokeshi, but after the second World War, a trend of creative kokeshi appeared, a style giving artists complete freedom regarding shapes and colors.
I photographed this kokeshi collection at Tokyo Big Sight, at the Antique Jamboree:
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 18mm
Aperture: F/5.6
Shutter Speed: 1/60s
ISO Sensitivity: ISO 200