5: Yamamoto Shingen -New Name (NP)
Language/Culture (Sengoku period Japan) most important.
Yamamoto - Japanese family name, found in Solveig Prándardóttir's "Name Construction in Medieval Japan", dating to 1147, in the Heian era.
Shingen - Masculine Japanese houmyou, dated to the late Sengoku era. The most notable example is that of Takeda Shingen
(1521-1573), who was a daimyo of Kai Province. His name, with this spelling, is found in "The Samurai" by Stephen Turnbull, p.20 (Osprey Publishing, 2016) <https://www.google.com/books/edition/The_Samurai/dgCGDAAAQBAJ?
"Their leaders called themselves daimyo, which literally means 'great names', and 16th-century daimyo such as Takeda Shingen, Uesugi Kenshin and Date Masamune were to make 'great names' for themselves that eclipsed anything their heroic.
Shingen is also found 3 times in NCMJ, notably on p.404 in the table "Names of Other Important Figures", also citing Takeda Shingen. It includes a footnote denoting that it is a houmyou (Buddhist religious name), not a nanori. To the best of our abilities, we are unable to find any reason why houmyou and nanori cannot be used interchangeably.