Kaizen sits next to 4 phonetic neighbors — Kaison, Kayden, and Mason are the closest matches by sound. Most share Kaizen's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"continuous improvement"
"throne, master"
"bold counsel"
"possibly from a- (not) + treo (tremble)"
"God is salvation, Yahweh saves"
"rest (via Rocco)"
"descendant of Ceallachán"
"son of Jens (son of John)"
"charcoal, dark"
"modern American coinage, son of Case"
"at the ford"
"bent nose"
"statement of belief, system of faith"
"God is my light"
"son of Will (William)"
"old friend, noble friend"
"steadfast, firm"
"son of the lion"
"strength, manly beauty"
Similar sound: These names share phonetic patterns with Kaizen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Kaizen.
Rhythm: Kaizen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.