a historical period where social disorder is so great due to war, disease, political disorder etc. that there is little or no cultural development; Dark Ages

(construction, architecture) The large, central pillar that holds up a traditional Japanese house. / The breadwinner of a household or organization.

aorta

a private university

a play focusing on modern events and issues from World War II and up; contemporary drama, a modern play

Kyūjitai form of 代数学 (“algebra”)

foreign minister

fee, payment, charge, price

great disaster resulting from an earthquake

saying as much as one wants (usually complaints)