system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do Japenese put extra words after names in sentences sometime?

Examples being “kun” or “senpai”
gpt
Those are *honorifics*, which most often are used to show the status of the person being spoken to. In your examples, *-kun* would be used for a male friend close in age, and *senpai* would be used for a slightly older person whom you respect and admire, though the word literally refers to older siblings.