(archaic, colloquial) a nickname of Ariwara no Narihira, Heian-period waka poet

just as in the old days, just as it used to be

(archaic) used in the beginning of narratives or story literature: once upon a time, long ago

modern language / (especially in reference to Japanese) modern Japanese; Japanese in its current form, spoken since the Meiji era and based on the Tokyo dialect

"Modern kana usage", the method of using kana to write Japanese that has been used after the 1946 (post-war) Japanese national language reform. Unlike its predecessor, it is almost entirely phonetic, reflecting modern language with little ambiguity.

Modern English

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

modernization

to modernize

(fandom slang) in fanwork, placing characters in a modern AU