I understand alliteration to be "repetition of a sound in successive stressed syllables". Assuming that's correct then "Tsuki hits" should be alliterate (since stress pattern is "TSU-ki HITS"). But when I say 'hits', the 'ts' seems quieter and less forceful than the 'hi' despite being in the same syllable. While it falls under the definition, "Tsuki hits" doesn't feel like it should.
I'm wondering if this means that my understanding of alliteration is incorrect (e.g. it's not based on stressed syllables, but rather on some other word divisions) or if despite how it sounds to me, "Tsuki hits" is alliterate.