留Chronology

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580600670700800900100010801100120015401600177018001900 620–669750–799840–899910–9991010–10791290–15391700–1769

2

2

1

1

3

1

2

1

2

1

1

2

2

1

1

2

2

1

1

1

1

1

1

1

2

30 +24

6

1

22 +16

12 +6

10 +4

4

4

1

6

2

1

1

3

No year recorded 260

+254

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 ↗