The upper reach of the Tochikura River.  
  Part of: Miyazaki Y, Nakae M, Senou H (2014) Ichthyofauna of the Kubo, Tochikura, and Ichinono river systems (Kitakami River drainage, northern Japan), with a comparison of predicted and surveyed species richness. Biodiversity Data Journal 2: e1093. https://doi.org/10.3897/BDJ.2.e1093