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I need to flag a critical geographic mismatch in your request before proceeding.
**Geographic Conflict:** The search results provided contain extensive information about Zuihoden Mausoleum and Date Masamune's history—but this site is located in **Sendai, Miyagi Prefecture**, not Kokura Castle (which is in Kitakyushu, Fukuoka Prefecture). These are separate locations approximately 600 kilometers apart with no direct historical connection to the query combination.
Zuihoden is the mausoleum of Date Masamune (1567–1636), founder of the Sendai domain, and houses his remains plus those of his son and grandson. Kokura Castle, by contrast, was a Toyotomi-era fortress with a different lordship history and no documented Date family association.
**I cannot ethically produce the metadata and article structure you've requested because:**
No verified articles currently available.