The Japanese consonant sounds are combined with the /ya/, /yu/ and /yo/ syllables to form a single contracted syllable. For example, /ki/ and /ya/ combine to form the single syllable /kya/, represented in Hiragana as きゃ. See the following chart for the complete list of these contracted syllables.
Consonant/i/ + /ya/ Consonant/i/ + /yu/ Consonant/i/ + /yo/ きゃ kya きゅ kyu きょ kyo しゃ sya (sha) しゅ syu (shu) しょ syo (sho) ちゃ tya (cha) ちゅ tyu (chu) ちょ tyo (cho) にゃ nya にゅ nyu にょ nyo ひゃ hya ひゅ hyu ひょ hyo みゃ mya みゅ myu みょ myo りゃ rya りゅ ryu りょ ryo
Note that these contracted syllables are always considered to be one syllable, not two. Compare the two (totally different!) following sounds:
kya (one syllable) kiya (two syllables) きゃ きや
When /n/ is followed by another consonant, or if a word ends with /n/, then that /n/ is a syllable in itself, and is written with the symbol ん. In JSL this syllable /n/ is represented as /n/.
[Japanese 1] [Hiragana]