Use mangadex like every other civilized person.
Anyway, Japan's new laws have nothing to do with it. These site are using servers that aren't based in Japan so Japan's laws can't and won't affect them. KM was just cheap and hosted their shit on google's servers.
FYI, Kissanime was also taken down
Spoiler:.
and nothing of value was lost
In better news...
This is how you reduce piracy, by making your shit more accessible.