Shigeki sits next to 3 phonetic neighbors — Shigeto, Shigeo, and Shigeru are the closest matches by sound. Most share Shigeki's Japanese cluster, so the rhythm and vowel shape carry across the list.
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"prosperous tree or thriving tree"
"of the mountain"
"breast, rounded hill"
"perfect joy, supreme happiness"
"the Lord's house; a place of Christian worship"
"old friend, noble strength"
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"hope"
"full of life, lively, alive"
"yarrow plant"
"Self-reliant, self-sufficient"
"Gift of God; one who is like God"
"God is gracious"
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"Pattern; model; example"
Similar sound: These names share phonetic patterns with Shigeki — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Shigeki.
Rhythm: Shigeki is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.