急Chronology

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51058068074083090010001100120015401600170018001900 520–579590–679690–739750–829840–899910–9991010–10991290–1539

1

1

1

1

1

1

1

1

2

1

1

1

1

1

1

3

1

2

2

15 +9

3

1

5

1

1

6

2

14 +8

15 +9

8 +2

5

5

7 +1

29 +23

2

7 +1

8 +2

1

3

No year recorded 250

+244

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 ↗