Daishitsu

大室
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◯  建保︱ 山城
Daishitsu
IDDAI59
ProvinceYamashiro
EraKenpō (1213-1219)
Active Period1213-1219

Source Rating Reference/Page
Hawley30DAI59 
Signatures:
山城大宮國盛
yamashiro ōmiya kunimori

Sharp.
Appears to use both names in signatures: Ōmiya 大宮 and Daishitsu 大室 (must be as a mistake).