One is “えいごであそぼ”, which means ‘Let’s play in English’.
This program’s some (original?) musics are pretty good.
Another one is “プレキソ英語” , which means “the preparation for the fundamental English
There is a other program “基礎英語”, which means “the fundamental English”,
and in the whole of its program English is explained by Japanese.
So I think “the preparation ” one is rather better for learning English, and my kids like the former one.