Little brother would be oto or ototo. Theoretically, you could attach suffixes to make it oto-chan, oto-kun, or so on... but I don't think that's very common at all.
Japanese Text: 弟
How do you Say it Verbally?: otouto
Example:
I have 2 little brothers - watashi WA otouto ga futari ga imasu
otouto = younger brother otouto san WA _____ = my younger brother is _____ You call your little brother otouto. If it is a baby you can refer to it as akachan as well, but it seems a little distant.
ototo
"Little brother" in Thai is pronounced as "น้องชาย" (nóng chaai).
otouto
Your younger brother: Otoosan (polite) Your elder brother: oniisan (polite)
you can say "nong" to a little brother or sister
弟 Otōto
You may say 'imouto.'
hiko
兄 (ani) is older brother in Japanese. When addressing someone else's older brother, you should use お兄さん (onii-san).
You may say 'ani' for older brother, and 'otouto' for younger brother, written (in that order): 兄 弟
otouto i have 2 little brothers - watashi WA otouto ga futari ga imasu In Japanese Text: 弟