Congratulations on new baby in japanese

Here are some common ways to congratulate someone on a new baby in Japanese:

1. (Mata neko ga umarete kureta yo!) - Congratulations on the new baby!
2. (Shōgakkō e ikimasu!) - Off to kindergarten! (a playful way to congratulate someone on a new baby)
3. (O-jiisan to obaachan wa dō desu ka?) - How are your grandparents doing? (a way to ask about the baby's grandparents)
4. (Kodomo no ki ga saku!) - The child's tree is blooming! (a metaphor for a new baby)
5. (Mata neko ga umarete kureta ne!) - Congratulations on the new baby, again!
6. (Kodomo no tanjō o medeta!) - Congratulations on the birth of the child!
7. (O-jiisan to obaachan wa dō desu ka?) - How are your grandparents doing? (a way to ask about the baby's grandparents)
8. (Kodomo no ki ga saku!) - The child's tree is blooming! (a metaphor for a new baby)
9. (Mata neko ga umarete kureta yo!) - Congratulations on the new baby!
10. (Kodomo no tanjō o medeta!) - Congratulations on the birth of the child!

Note: In Japan, it's common to use honorific language when speaking to someone who is older or in a position of authority. When congratulating someone on a new baby, it's polite to use honorific language to show respect.