It's hard to say for certain. You'd need to look into the background and author's intentions. Some stories are inspired by real life but are not strictly true in every detail.
I don't think it is a well - known story. There are many stories out there, and this one doesn't seem to be part of the common literary or oral tradition that most people are familiar with. However, it could be a very local or niche story within a certain community or group of people.
I'm not sure specifically which 'one man one jar story' you're referring to. There could be various stories with such a title, it might be a very unique or personal narrative, or perhaps a less - known fictional piece.
Once there was a man named Jack. He lived alone in a small cottage by the forest. Every day, he would go out to paint the beautiful landscapes. One day, while he was painting near a stream, he saw a deer. Instead of scaring it away, he quietly painted it. His solitary life was filled with such simple joys of being close to nature.
The Man in the Moon is not based on actual events. It's a fictional tale that has been passed down through generations for entertainment and imagination.
One Punch Man is about a guy named Saitama who can defeat any enemy with just one punch. But despite his amazing power, he struggles with the boredom of having no real challenge.