紫Chronology

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500580600730830900970110012301540160017001800 510–579620–729750–829840–899910–969980–10991160–12291290–1539

1

1

1

1

1

1

1

1

1

1

2

1

1

10 +4

1

1

1

2

1

2

10 +4

24 +18

1

2

5

13 +7

8 +2

9 +3

2

3

7 +1

3

7 +1

2

3

No year recorded 123

+117

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 ↗