This is the Obansho, the office where the travelers were inspected by the Odawara officials. With a little imagination, it looks like this still happens. But now they let the girls pass freely...;)
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 18mm
Aperture: F/5.6
Shutter Speed: 1/250s
ISO Sensitivity: ISO 200