The Chinese glyph for purple (along with so much else commonly misattributed to Japan such as Ramen, various mushrooms, etc.) is most certainly not from Japanes

The Chinese glyph for purple (along with so much else commonly misattributed to Japan such as Ramen, various mushrooms, etc.) is most certainly not from Japanese, a language whose written form only dates from ~800AD. Reviewing the Wiktionary page should clarify https://en.wiktionary.org/wiki/%E7%B4%AB https://en.wiktionary.org/wiki/%E7%B4%AB ... but failing that, https://ctext.org/pre-qin-and-han?searchu=%E7%B4%AB https://ctext.org/pre-qin-and-han?searchu=%E7%B4%AB is a list of pre Qin (221BCE–206BCE) and Han (202BCE-220CE) texts using the character in China, which had writing for more than a thousand years before Japan.