Final answer:
Rice trading in Japan traces back to the 7th century during the era of Empress Suiko, which was intricately linked to the ideological and practical adoption of rice culture from the Tang Chinese civilization. Sake brewing, although not precisely dated, logically followed as a practice linked to rice cultivation.
Step-by-step explanation:
The establishment of rice trading in Japan can be dated back to approximately the 7th century, with Empress Suiko and Prince Shotoku advocating for Buddhism as a state religion during that time, which likely had a significant impact on the country's agricultural practices, including the advancement of rice cultivation. This era saw cultural transformations that involved adapting various aspects of Tang Chinese culture, of which rice was a central part.
Furthermore, the question also queries what came after rice trading. While tea trading was significant, the evidence seems to suggest that sake brewing, due to being connected to rice production, may have followed the establishment of rice trading, though the specific timing is less clear in historical accounts.
Since there is no direct reference in the provided materials to the exact time when sake brewing followed after rice trading, the best answer based on historical context seems to align with rice trading in the 7th century and sake brewing following soon after.