Still part of the Legendary Period, dates for the emperors of this period are less uncertain but still not entirely trustworthy.
Japanese did not have its own script before the fifth century.
(Additional information from External Link: ) Rice culture was imported into Japan around 200-100 BC by farmers who migrated from the Korean peninsula, although some experts believe the influx may have begun up to seven hundred years earlier.
These newcomers also introduced the language from which all modern dialects of Japanese appear to descend, replacing any language possessed by the earlier populations of hunter-gatherers (see the Legendary Period, below, for a more detailed examination of Japanese language origins).
Their own Japanese script was developed from this over the course of time.
According to legend, Emperor Jimmu Tenno arrived with his people on the islands of Japan in 660 BC.
However, the number of his successors between that arrival and the first truly historical emperors puts that arrival at some time in the first century, coinciding with the Yayoi Period, and all dates prior to AD 500 should be approached with caution.
With the introduction of agriculture, social classes started to evolve, and parts of the country began to unite under powerful land owners.
Chinese travellers during the Han and Wei dynasties reported that a queen called Himiko (or Pimiku) reigned over Japan at this time.