Hiroshi Koyama
type: Person
description: researcher
works for: Gunma University
has occupation: public health scientist
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  served at: 2026-08-15T23:53:48.022071Z
  entity updated at: 2026-05-03T16:20:22.557058+00:00Z
  entity created at: 2026-05-03T14:16:41.400501+00:00Z