母ちゃん

From 母 (kā, “mother”) +‎ ちゃん (-chan, “familiar suffix”).

母(かあ)ちゃん • (kāchan) 

1. (term of endearment) mum, mommy

• ママ (mama): (childish) mama, a childish form of mother, one's female parent
• お母(かあ)さん (okāsan): general term for one's mother
• お袋(ふくろ) (ofukuro): (informal) one's own mother

• 父(とう)ちゃん (tōchan): pop, dad