Complex sentence: Episode 14 ended up airing on January 15,1989 because Emperor Shōwa died on January 7, and on April 12, the day that Episode 25 aired, the show began airing on Wednesdays instead of Sundays.
Split into simpler sentences: Episode 14 ended up airing on January 15,1989 because Emperor Shōwa died on January 7,1989. And on April 12,1989 (The day that Episode 25 aired) the show aired on Wednesdays instead of Sundays.