井Chronology

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51080090010001120123015401600170018001900 520–799840–899910–9991010–11191150–12291290–1539

1

2

1

1

1

1

1

1

1

1

1

6

1

9 +3

1

2

30 +24

5

1

13 +7

1

13 +7

11 +5

6

2

2

2

3

8 +2

6

10 +4

8 +2

86 +80

1

22 +16

2

No year recorded 197

+191

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 ↗