Japanese uses two parallel phonetic syllabaries side by side — hiragana for native Japanese words and grammar, and katakana for foreign loanwords — where each character stands for a whole syllable rather than a single sound, and stroke order matters for every one. This collection works through hiragana first, then introduces katakana once the base syllabary feels solid.
Not sure where to start between hiragana and katakana, or how much stroke-order drilling is enough? The guide below covers why tracing should come before free writing for a stroke-order-based script like this, and how to tell if Japanese should be your child's first or second foreign script.