床Chronology

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500580660700800900110012301540160017001800 520–579590–659750–799910–10991160–12291290–1539

1

2

2

1

4

1

3

1

1

1

1

1

1

2

1

2

2

1

1

3

1

1

2

35 +29

1

1

3

1

7 +1

1

3

3

2

3

4

No year recorded 72

+66

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 ↗