理性: reason; logic; rationality

勢人: (rare) a person with power and influence

(Hachijō) elder brother

probably because ~

(Shinto) a spirit or an essence present in all things, the main subject of worship of Shinto / (by extension, religion) a deity, god / (by extension) thunder / a Shinto shrine

a place name / a surname

(archaic) eldest son / (archaic) a senior / (archaic) (by extension) an elder sibling / (archaic) the head of a clan / (archaic) a skilled craftsman

Extended shinjitai form of 嚙: to bite; to chew; to gnaw

(archaic) under the old Ritsuryō system of ancient Japan, the highest of the four ranks of civil servant staff, and general term for head administrators of government departments

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