More than a month has passed since nationalistic school operator Moritomo Gakuen first made headlines over a controversial land deal for its next school.

With fresh revelations piling up daily against the Osaka-based company, the scandal has also engulfed the Diet, particularly the ruling Liberal Democratic Party, its leader, Prime Minister Shinzo Abe, as well as his wife, Akie.

But what is the central issue and why is the scandal impacting the political world, and Abe's administration?