You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "where did japan get its first writing system from?" whose answer is adopted Chinese characters.
Each document should contain about 30 words, and these documents should contain useful information.

Query: origin of Japanese writing system
Useful Output:

Doc 1: The Japanese writing system, with its origins in Chinese, is among the most complicated writing systems in the world (Hallen, 1999).
Doc 2: Japanese aristocrats started writing Japanese using Chinese characters. This development gave rise to the first kana writing system, known as the Man'yōgana.
Doc 3: The origin of the Japanese writing system dates around the third or fourth century when Chinese characters, known as 漢字 kanji, were first brought to Japan.
Doc 4: As a whole, the roots of the Japanese writing system are Chinese, though as we will see this is up for debate for katakana.
Doc 5: That is to say, Chinese was written in Japan before a writing system was developed for the Japanese language. Over time, words were used to