Regular verb classes

Contrary to the typical way these classes I presented, I opt for treating only nidan and yodan as "regular" verb classes, with the reasoning being these are the only classes which don't have only a small fixed number of verbs belonging to it. Additionally, the irregular verb classes can almost always be traced down as a variant/hybrid of the regular classes

Yodan (~75% of verbs)

form	suffix	example
root	-	yom
mizen	-a	yom-a
ren'you	-i	yom-i
shuushi	-u	yom-u
rentai	-u	yom-u
izen	-e	yom-e
meirei	-e	yom-e

Shimo-nidan (~20% of verbs)

form	suffix	example
root	-	hajim
mizen	-a	yom-a
ren'you	-i	yom-i
shuushi	-u	yom-u
rentai	-u	yom-u
izen	-e	yom-e
meirei	-e	yom-e

Kami-nidan (~5% of verbs)

Irregular verb classes

Ichidan

The ichidan class is closed, as the vast majority of modern ichidan verbs actually come from nidan