WEBHokuriku subregion with Niigata. The Hokuriku region (北陸地方, Hokuriku chihō) is located in the northwestern part of Honshu, the main island of Japan.It lies along the Sea of Japan and is part of the larger Chūbu region. It is almost equivalent to the former Koshi Province and Hokurikudō area in pre-modern Japan.. From the Heian period until the Edo period, the region was a core ...