歎Chronology

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580600670700800900970100011001200141015401600170018001910 620–669740–799910–9691010–10991290–14091420–15391860–1909

1

3

4

1

2

1

4

2

1

1

1

1

1

1

1

4

1

2

1

1

1

1

1

4

1

3

27 +21

1

13 +7

7 +1

1

8 +2

1

1

No year recorded 73

+67

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 ↗