Question: What were Diamond and Shogun?
Sentence (from "Shogun (1986 board game)"): It was renamed to Samurai Swords in its first re-release (1995) to disambiguate it from other games with the same name (in particular, "James Clavell's Shogun", a wargame with a similar theme, released in 1983), and renamed again to Ikusa in its 2011 re-release under Hasbro's Avalon Hill banner.
Relevant evidence: Yes