断Chronology

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460500580600700800900960100010801100120014101650176018001900 520–579750–799910–9591010–10791230–14091420–16491700–1759

1

1

2

2

3

1

3

1

1

4

1

1

4

1

1

2

1

1

1

2

1

3

1

2

4

4

2

2

1

1

59 +53

25 +19

7 +1

1

3

24 +18

51 +45

2

3

15 +9

1

1

No year recorded 177

+171

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 ↗