Nihoner
Nihoner 日本史

日本の歴史

Japanese History

Every period, era, battle, ruler and castle — from the Jōmon hunter-gatherers to Reiwa. 2,052 entries, each with the Japanese name, its reading, and the kanji broken down character by character.

Built for people learning Japanese: the history and the language it is written in, on the same page.

The periods 時代

Browse by type 分類

Ways in 案内

Start here 入門

How Japanese history is divided

Japanese history is normally split into periods (時代, jidai) named after wherever power sat at the time — Nara, Heian, Kamakura, Edo. The boundaries are conventions rather than hard facts, and different books place some of them a decade apart.

Running alongside the periods is a second, finer system: era names, or nengō (元号). An era name could be declared for a new emperor, or simply to shake off a run of bad luck after a fire or an epidemic, which is why there are 249 of them and only sixteen periods. Dates in Japanese documents are almost always given in nengō — 慶長5年 rather than 1600 — so reading historical Japanese means knowing them.

Since the Meiji era, the rule has been one era name per reign, and it still governs official paperwork in Japan today. A form asking for your birth date in 平成 or 令和 is using a system that started in 645.

Why a Japanese-learning site publishes history

Because the two cannot really be separated. The kanji in 関ヶ原の戦い tell you it was fought at a barrier on a plain. 幕府 (bakufu), the word for the shogunate, literally means "tent government" — a military headquarters that never stopped calling itself temporary, for 700 years. The vocabulary carries the history inside it.

So every entry here gives the Japanese name, its reading in kana, and a breakdown of each kanji that links straight through to that character's full entry in the kanji dictionary.