If you mean 'how would these words sound if I used Japanese characters to write them so that they still sound as similar as possible':
Ritturu Jyapaniizu.
アイラブユーリトルバニー
弟 Otōto
'Chiisai bara.'
White when translated from English to Japanese is shiro for shiro means white
Chocolate is 'chokoreeto' in Japanese.
Dog in Japanese is 'inu'.
Domo.
Koibito.
Sakarerumono
Owari
Hajime mashite?
Yonbanme