はれときどきぶた
A picture book written by "Yadama Shirou":https://en.wikipedia.org/wiki/Shiro_Yadama in 1980. It has 9 sequel books, an anime film adaptaiton and a TV series.
Its English title is "Fair, then  Partly Piggy" (picture book) / "Tokyo Pig" (TV anime).

h4.See also

* Wikipedia: http://en.wikipedia.org/wiki/Fair,_then_Partly_Piggy
* Wikipedia: http://en.wikipedia.org/wiki/Tokyo_Pig
hare tokidoki buta