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Minami-Hiyoshi lies near the SE end of a coalescing chain of youthful seamounts and is the only historically active vent. The morphologically youthful seamount Naka-Hiyoshi (upper right) lies to the NW and Ko-Hiyoshi seamount (left) to the SSE. Image courtesy of HOD Japan Coast Guard (http://www1.kaiho.mlit.go.jp/jhd-E)