noun
the 'ta' column of the Japanese syllabary (ta, chi, tsu, te, to)
Refers to the set of kana starting with the consonant /t/: た/タ, ち/チ, つ/ツ, て/テ, と/ト. Used in discussions of kana order, conjugation, or indexing.
五十音図で、タ行は「た・ち・つ・て・と」です。
In the gojūon chart, the ta-row is 'ta, chi, tsu, te, to'.
五十音 is the entire fifty-sound syllabary grid, while タ行 refers specifically to one row (the 't' row) within it.
Compound of タ (ta, first kana of the row) + 行 (ぎょう, 'row' or 'line'), following the standard naming pattern for rows of the kana syllabary.