(informal) "not knowing even a millimeter": completely ignorant in regards to something

you should not interfere in a marital dispute

(literally) know the other side and yourself, a hundred battles will not be perilous

(history, government) a 律令 (ritsuryō) office under the 宮内省 (Kunaishō, “Ministry of the Imperial Household”), responsible for managing animal and plant oil production

(Japanese mythology) one of the first three gods who came into existence when heaven and earth began (天地開闢 (tenchi kaibyaku)), along with 高皇産霊 (Takamimusuhi) and 神皇産霊 (Kamimusuhi)

a male given name

(idiomatic, proverb) be quick on the uptake, understand the whole situation from just a few clues

(figuratively) a narrow world view based on limited experience

an ordinary person cannot understand the ambitions of a great man