Disambiguation evidence for Iwate Prefecture (area of present-day Hiraizumi or its environs) via surface form

"Iwate Prefecture (area of present-day Hiraizumi or its environs)"

Triples (1)

Triples where some other subject referred to this entity as "Iwate Prefecture (area of present-day Hiraizumi or its environs)".

Koromogawa, Mutsu Province → presentLocation →
"Iwate Prefecture (area of present-day Hiraizumi or its environs)"
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