"abbreviation") When a small Y-row (ヤ行 Ya-gyō) kana follows an I-column kana of the S-, Z-, T-, D-, or H-rows (サ～, ザ～, タ～, ダ～, ハ行; Sa-, Za-, Ta-, Da-, Ha-gyō)...

There are four types of "irregular inflection" (変格活用, henkaku katsuyō): sa-gyō henkaku katsuyō (サ行変格活用), abbreviated sa-hen (サ変). This type applies to...

are classified as sa-hen (サ変), an abbreviation of sa-gyō henkaku katsuyō (サ行変格活用), sa-row irregular conjugation). ka-group which also has one member, kuru...