已Chronology

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460500580600700800900970100010801100120014101590160018001940 520–579750–799910–9691010–10791290–14091420–15891690–17991880–1939

1

1

2

2

23 +17

1

28 +22

2

1

3

1

4

1

2

1

1

1

2

1

7 +1

2

3

9 +3

1

2

2

1

1

1

1

1

1

7 +1

7 +1

20 +14

2

3

2

2

No year recorded 227

+221

Each crop stands at the decade of the first year its book's date gives; a date given only as before a year stands at that year. Dates come from the catalogues and editions cited with each record. The bars draw the whole span and their counts to scale; in the strip below them, fifty years or more with no crop are folded and marked. Japanese dates converted with HuTime ↗