Okumura rhymes with:
matsumura, chmura, imamura, inamura, kawamura, kimura, kitamura, komura, matsumura, mitamura, moura, mura, nakamura, nishimura, nomura, okamura, takemura, tamura
Okumura sounds like:
o'conner, o'connor, ochsner, oconner, oconnor, okamura, osmar, osmer, oxner