It's fun to have guests on New Year's Eve is an episode of the 1981 Ninja Hattori-kun anime.
Kenichi's uncle visits for New Year's Eve and causes problems for the kids. After the gang chase Kenichi's uncle away, Kenichi's great - uncle and second cousin visit. While the grouchy great-uncle has tea with Mr and Mrs Mitsuba, Hattori and the rest of the gang have to keep an eye on Kenichi's obnoxious cousin. At first, Kenichi's cousin is a bit of a handful, but a happy ending is in store for them.
It's New Year's Eve 1982, and the Mitsubas are preparing for a very important visitor: Kenichi's uncle. As he comes in, he shows his true colours by annoying Hattori. Shinzo tries to distract him, but when Shishimaru takes it one step too far, Kenichi's uncle runs off and Mr Mitsuba tells all four of them off. Just then, the uncle returns to get his wallet back.
Later on, Kenichi's great-uncle arrives with his obnoxious grandson - Kenichi's second cousin. He comes in and taunts Kenichi for his poor room condition and breaks one of his model planes, but when the game turns to paint-flicking, they enjoy themselves so much that even grouchy great-uncle is pleased to see them play.
Mr and Mrs Mitsuba