i, o and e represent kōrui or neutralised i, o and e.
ï, ö and ë represent otsuruii, o and e.
The kō-otsu distinction is only made with:
ki, fi, mi, gi, bi
ke, fe, me, ge, me
ko, so, to, (mo), yo, ro, go, zo, do
The e of keru, to kick, the only shimo-ichidan verb, does not have an attested distinction between kōrui or otsuruie.
The i of miru, to curve, is thought to be otsurui, but it is not well-attested. All other kami-ichidan verbs are kōrui, if a kō-otsu distinction is made at all.
Thanks to Bart Mathias for providing information on the kō-otsu distinctions.
i, o and e represent kōrui or neutralised i, o and e.
ï, ö and ë represent otsuruii, o and e.
The kō-otsu distinction is only made with:
ki, fi, mi, gi, bi
ke, fe, me, ge, me
ko, so, to, (mo), yo, ro, go, zo, do
The e of keru, to kick, the only shimo-ichidan verb, does not have an attested distinction between kōrui or otsuruie.
The i of miru, to curve, is thought to be otsurui, but it is not well-attested. All other kami-ichidan verbs are kōrui, if a kō-otsu distinction is made at all.
Thanks to Bart Mathias for providing information on the kō-otsu distinctions.