毎Chronology

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610112015901600170018001900 620–11191160–1589

1

1

2

1

1

2

70 +64

32 +26

2

1

1

2

1

13 +7

23 +17

5

4

1

2

6

7 +1

3

1

No year recorded 172

+166

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 ↗