What does "grandma" mean to the elderly in Japan?

Strictly speaking, the difference between the two is that the former is more formal and suitable for common occasions;

The latter is a language biased towards intimacy, which can also be understood as children's language and women's language.

"ぉばぁさん" and "ぉばぁちゃん" can both be translated as "grandma".

The former "ぉばぁさん" can be understood as a general term for elderly women, which is equivalent to polite honorifics such as "grandma" and "grandma". The objects used are not necessarily related by blood, so they are widely used.

The latter is "ぉばぁちゃん"1,the address of your grandmother (the speaker is your grandmother herself). 2. Kindly address for older women by children or young women.

note:

Under special circumstances, if you need to mention your grandmother in conversation with others, you must remove "ぉばぁちゃん". "

Similarly, if you want to mention the other person's grandmother in the conversation, you must add "ぉ" and express your respect for the other person in the previous expression of "さん".

This is the simplest and most basic, of course, sometimes it depends on the flexibility of the context.