This was originally just JIS Roman [0], the Japanese ASCII variant from 1969. Shift-JIS is what much later then added double-byte character set support. [0] ht

This was originally just JIS Roman [0], the Japanese ASCII variant from 1969. Shift-JIS is what much later then added double-byte character set support. [0] https://en.wikipedia.org/wiki/JIS_X_0201 https://en.wikipedia.org/wiki/JIS_X_0201