おじいちゃん Also written お爺ちゃん, お祖父ちゃん Meanings Noun grandpa; granddad Common phrases おじいちゃんになる Words containing おじいちゃん おじいちゃん子 (おじいちゃんこ) child who is very close to their grandfather おじいちゃんっ子 (おじいちゃんっこ) child who is very close to their grandfather Word lists Familiar language Jinuma: Japanese Dictionary · Word lists