noun
rainout substitute program
A TV or radio program prepared as a backup for a live sports broadcast that is canceled due to rain. Often a movie, documentary, or pre-recorded show.
野球中継が雨で中止になったので、雨傘番組として映画が放送された。
The baseball broadcast was canceled due to rain, so a movie was aired as a rainout substitute program.
Compound of 雨傘 (amagasa, 'umbrella') and 番組 (bangumi, 'program'), referring to a program kept 'under an umbrella' in case of rain.