The shiba is the smallest and oldest of the native Japanese breeds, who's original purpose was for hunting birds and small game in the dense undergrowth of Japan's mountainous regions. The Second World War had a devasting effect on shiba populations in Japan, with only three blood lines remaining - Sanin shiba, Mino shiba and the Shu Shu shiba. It is from the Shin Shu shiba that todays shibas have evolved.