Done that. Not with the music notation he made, which is more close to Klavarscribo.
Different score lines and adjusting noteheads between lines. Not suitable for handwriting, texting.
Otherwise he (Wataru Dabo Ohkawa, ムトウ カンペイ) is extremely skilful multi-instrumentalist!
There are many proposals but most are related to some form of score with lines and such, which I do not like.
http://musicnotation.org