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century

twentieth century

end of a century (esp. 19th)

traveller's journal

pre-era

Devonian period

era

last century

enforcement of official discipline

law and order

Rikkokushi (six national histories of Japan compiled in the Nara and Heian periods)

century

millennium

this century

years (since the start of an era)

year

The Epoch Times

calendar era

21st century

Nihon Kōki (third of the six classical Japanese history texts)

half century

Christian Era

party discipline

new era

next century

Nihon Shoki (second oldest work of Japanese history, compiled in 720 CE)

Quaternary period

quarter of a century

post-era

Shoku Nihongi (second of the six classical Japanese history texts)

new century

Neon Genesis Evangelion (media franchise)

rules which officials must follow

new era

travel writing

bulletin

the Kojiki and Nihon Shoki (earliest historical records of Japan)

fin-de-siècle

annals-biographies form (of historical writing)

Nihon Shoki (second oldest work of Japanese history, compiled in 720 CE)

topical-annalistic style (of historical writing)

Citrus kinokuni (species of mandarin orange)

Shoku Nihon Kōki (fourth of the six classical Japanese history texts)

Christian era

school discipline

Shoku Nihongi (second of the six classical Japanese history texts)

millennials

biography

Holocene Era (calendar year numbering system)

Kisei Main Line (Wakayama-Mie railway)

Shaku Nihongi (commentary on the Nihon Shoki compiled in the late 13th century)

Kii (former province located in present-day Wakayama and southern Mie prefectures)

Jurassic (period)

period

Permian period

Silurian period

Ordovician period

Cambrian period

Perpetual Commentary on the Chronicles of Japan (by Tanikawa Kotosuga, 1762)

Proceedings of the National Academy of Sciences of the United States of America

relic from an earlier age

Imperial era

Empire Day (February 11th; national holiday held from 1872 to 1948)

the Tertiary period

Kishu (Japanese dog breed)

the Carboniferous Period

Triassic period

Permian period

decay (decline, corruption) of public morals

Buddhist calendar

age of a young lady who is at the peak of her (sexual) attractiveness

Kishu Railway

ballad found in the Kojiki and Nihon Shoki

laxity in official discipline

Ordovician period

Kinokuniya

lack of (slackness in) military discipline

corrupt public morals

laxity in official discipline

public morals

Cretaceous Period