Tōnō
is the southeastern portion of Gifu Prefecture in the Chūbu region of Japan . 
<triplet> Gifu Prefecture <subj> Chūbu region <obj> part of <subj> Japan <obj> country <triplet> Chūbu region <subj> Gifu Prefecture <obj> contains administrative territorial entity <subj> Japan <obj> country <triplet> Japan <subj> Gifu Prefecture <obj> contains administrative territorial entity