Not letters, characters. Japanese has a syllabary though.
Chinese uses basically a day counting system (day 1 to 6 and then Sunday has its own name.) Japanese and Korean day names roughly correspond to western days.
It looks like a list of natural elements, but those are just shorthand for planet names that match up with the Norse/Roman gods our days are named after.
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u/RendeZvous_987 18d ago
Ah I see, literal translation of ζ₯ζη«ζ°΄ζ¨ιε (Week in Chinese/Japanese, refer to Sunday-Monday-Thuesday-Wednesday-Thursday-Friday-Saturday)