兒Chronology

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50058066074090097010001100123015401600177018001900 520–579590–659690–739750–899910–9691010–10991160–12291290–15391690–1769

1

1

2

1

1

1

1

1

1

1

1

3

1

1

4

1

1

1

5

1

2

4

22 +16

1

2

11 +5

2

2

2

5

1

2

1

No year recorded 182

+176

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 ↗