基Chronology

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500610740830900111015401660172018001900 510–609620–739750–829840–899910–11091160–15391600–16591670–1719

1

1

1

1

1

2

1

1

1

1

1

1

1

4

2

2

1

12 +6

12 +6

3

3

3

3

1

1

3

3

No year recorded 108

+102

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 ↗