ひとりっこ
Composed of
one person; being alone; being by oneself; being single; being unmarried; by oneself
someone with a liking or characteristic; a true representative of (place)
Used in vocabulary (1 in total)
one-child policy (of the PRC)
Examples (5 in total)
I am an only child.
Are you an only child, too?
Are you an only child?