This is very legible for a native english speaker
This is very legible for a native english speaker
The actual problem without using spaces is not that humans can't read it, it's that computers can't read it (without at least complete dictionary and maybe some AI help). GNU aspell for instance does not support languages that don't use spaces.
https://en.m.wikipedia.org/wiki/MeCab
Like you said, it does come with a dictionary to work properly.
After more practice I've found myself starting to pick up on common dividers, like particles, verb endings, adjective endings, etc. I assume native speakers do this instinctually, much like native English readers aren't really reading letter by letter (wichh is why txet lkie tihs is rbleadae at ntiave seepd for most)