NIPPON ROMAN SPELLING SYSTEM

Japanese has 5 vowels and the combination of these and consonants.

- a i u e o
k ka ki ku ke ko
s sa shi su se so
t ta chi tsu te to
n na ni nu ne no
h ha hi fu he ho
m ma mi mu me mo
y ya i yu e yo
r ra ri ru re ro
w wa wi u we wo
n - - - - -
g ga gi gu ge go
z za ji zu ze zo
d da di du de do
b ba bi bu be bo
p pa pi pu pe po
f fa fi fu fe fo
ky kya - kyu - kyo
sh sha - shu she sho
ch cha - chu che cho
ny nya - nyu - nyo
hy hya - hyu - hyo
my mya - myu - myo
ry rya - ryu - ryo
gy gya - gyu - gyo
j ja ji ju je jo
by bya - byu - byo
py pya - pyu - pyo

In the case of an assimilated sound, consonants is repeated.