Shotgun House In Japan
According to wikipedia, this is the shotgun house because you could fire a shotgun through the front door and the pellets would fly cleanly through the house and out the door. Shotgun house is a narrow rectangular domestic residence, usually no more than 12 feet wide and with doors at each end. It is not suitable for a big family to stay in this house because it doesn’t allow much movement in the house.
Source: Japanese Space-Saver Home & Jammed In Japanese