Japanese grammar, verbs -conjugation samples Verbs ended with the る stems -(1) ら (2) り (3) る (4) る (5) れ (6) れ Verbs ended with the すstems -(1) さ (2) し (3) す (4) す (5) せ (6) せ Verbs ended with the く stems -(1) か (2) き (3) く (4) く (5) け (6) け Verbs ended with the ぬstems -(1) な (2) に (3) ぬ (4) ぬ(5) ね (6) ね ...stems with..「つ」、「す」、「ぐ」、「む」、「ぶ」、「う」 Japanese grammar, each verbs may have six different ways to conjugate. For example: 話す, its stems is す (1) 話さない (2) 話します、 話 しません、 話しま しよう、話しましだ (3)。。。(4)。。。(5) 話せます、話せません (6)。。。 聞く, it's stems is く (1) 聞か ない (2) 聞きます、聞きません、聞きましよう 、聞きましだ (3)。。。(4)。。。(5) 聞 けます、聞 けません (6)。。。 You question for the grammar, it looks like to conjugate the verb form the rule in the first and the fifth.

Ichidan、 一段、 first degree Godan、 五段、 fifth degree The ranking system, use in Judo, Karate, and others to classified their levels of knowledge. First degree is the lowerest, the tenth degree is the highest.

They're a bit different. You should check http://www.guidetojapanese.org/verbs.html