step / rank; grade

(after a number) -th rank; -th degree black belt (in karate, judo, etc) / a section (horizonal line) in the gojūon table, which consists of kanas that have or historically have a same vowel

(phonology, orthography, grammar) the first and highest-graded column of the 五十音図 (literally “table of the fifty sounds”), consisting of the ten kana あ/ア (a), か/カ (ka), さ/サ (sa), た/タ (ta), な/ナ (na), は/ハ (ha), ま/マ (ma), や/ヤ (ya), ら/ラ (ra) and わ/ワ (wa)

(phonology, orthography, grammar) the fourth and second-lowest-graded column of the 五十音図 (literally “table of the fifty sounds”), consisting of the nine kana え/エ (e), け/ケ (ke), せ/セ (se), て/テ (te), ね/ネ (ne), へ/ヘ (he), め/メ (me), れ/レ (re) and ゑ/ヱ (we), and sometimes additionally 𛀁/𛄡 (ye)

(phonology, orthography, grammar) the second and second-highest-graded column of the 五十音図 (literally “table of the fifty sounds”), consisting of the nine kana い/イ (i), き/キ (ki), し/シ (shi), ち/チ (chi), に/ニ (ni), ひ/ヒ (hi), み/ミ (mi), り/リ (ri) and ゐ/ヰ (wi), and sometimes additionally 𛀆/𛄠 (yi)

(phonology, orthography, grammar) the third and middle-graded column of the 五十音図 (literally “table of the fifty sounds”), consisting of the nine kana う/ウ (u), く/ク (ku), す/ス (su), つ/ツ (tsu), ぬ/ヌ (nu), ふ/フ (fu), む/ム (mu), ゆ/ユ (yu) and る/ル (ru), and sometimes additionally 𛄟/𛄢 (wu)

(phonology, orthography, grammar) the fifth and lowest-graded column of the 五十音図 (literally “table of the fifty sounds”), consisting of the ten kana お/オ (o), こ/コ (ko), そ/ソ (so), と/ト (to), の/ノ (no), ほ/ホ (ho), も/モ (mo), よ/ヨ (yo), ろ/ロ (ro) and を/ヲ (wo)

(grammar) a verbal conjugation class in which the verb stem ends in -i and consists of four alternating bases: -i, -iru, -ire, and -iyo/-iro

school grammar / (specifically) Japanese school grammar, based on Shinkichi Hashimoto's work and now universally employed in Japanese schools and dictionaries.

(grammar) solecism