(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)