mixed kanji-kana writing
Refers to text that mixes kanji and kana, the standard Japanese writing style, as opposed to pure kana or pure kanji.
Japanese sentences are often written in mixed kanji-kana script.
mixed writing (kanji and kana)
Standard kanji-kana spelling.
Variant with kana for 仮名; less formal but still seen.
Compound of 仮名 (kana) + 交じり (majiri, 'mixing'). The spelling 交じり is the continuative form of 交じる (majiru, 'to mix').