There is a problem so much to fit Japanese language.
Englishman, Edward Gauntlet challenged to apply Pitman theory to Japanese again and succeeded to open a new page.
To reduce graphical load in writing, Edward Gauntlet improved lineability by double lengthening vowel” I” group means vowel “E” group, and double lengthening “A” group to vowel “O” group in 1899. His system is called eclectic shorthand.
This is very good solution in writing syllable fast.
Kumasaki system in 1906 and Waseda system followed in 1930 accept this theory.