注Chronology

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500580600740800110016801700178018001900 510–579620–739860–10991200–16791730–1779

1

1

2

1

1

1

1

1

1

1

2

1

3

7 +1

1

1

1

5

2

2

1

9 +3

10 +4

1

1

1

1

No year recorded 244

+238

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 ↗