Ane Wa Yan -

Alternatively, the user might have meant to write "ane wa nani" (What is sister?) or "ane wa..." with an incomplete sentence. If the user made a typo, I need to figure out the intended phrase. Another possibility is that "ane wa yan" is a song title or a line from a drama, but I'm not familiar with it. Without more context, it's challenging.

In modern Japan, the concept of "ane wa yan" continues to influence various aspects of society, including: ane wa yan

If you are asking about the meaning of the character type: Alternatively, the user might have meant to write

The phrase carries a nuance when used by male characters referring to their own sister. Without more context, it's challenging

The phrase you are asking about is a misspelling of the Japanese term (which is likely a typo or mishearing of "Ane wa Otto ..." or a specific title).