Your best EInk option is the iRex iLiad or the new iRex DR1000S. The iLiad has a Chinese version, but you are better off getting the European one because it allows 3rd party software. I don't know the details of how these handle Japanese and Chinese fonts though.
Both allow note taking and have good PDF support, primarily because of their large (for EInk) screens. The DR1000S includes (english) dictionary lookup and word search inside a PDF, which isn't available on the iLiad.
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