- Birth of Yukari Origami.
- November 24, Rui Onda's birth.
- The Great Disaster of Sagami Bay happens.
Late 1990s to early 2000s
- June 16, Kaoru Mashiko's birth.
2002 or 2003
- May 15, Ellen Kohagura's birth.
- December 4, Kofuki Shichinosato's birth.
Before Spring 2012
- Chie Setouchi moves to the Okayama prefecture.
2016 and 2017
- Both National Swordsmanship Tournaments happening are won by Maki Shidou.
- The Minoseki Academy Representative Selection Tournament happens, in which Mihono Asakura loses to Kanami Etou, who goes on to represent Minoseki Academy in the National Swordsmanship Tournament.
- Two days later, the National Swordsmanship Tournament happens, ending without a winner as the finalists escape the premise.