Disambiguation evidence for Emperor Taishō's first son (future Emperor Shōwa) via surface form

"Emperor Taishō's first son (future Emperor Shōwa)"

Triples (1)

Triples where some other subject referred to this entity as "Emperor Taishō's first son (future Emperor Shōwa)".

Takahito, Prince Mikasa → sibling →
"Emperor Taishō's first son (future Emperor Shōwa)"
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linked to: Takahito