変
This Chinese character means change or strange.
You can watch how to write this. - (「変」の書き順（筆順）動画 - 漢字書き順辞典)
There are 3 ways to read this, "かわる (変わる)" or "かえる (変える)" or"へん".
"変わる (かわる)" and "変える (かえる)"is a verb which means change.
When this is combined with other Chinese characters, this is read as "へん".
"変化 (へんか)" also means change.
"変人 (へんじん)" means weirdo.
Honnō-ji Incident is "本能寺の変" in Japanese.
"変 (へん)" means incident in this context.
It was a very famous incident in Japanese history, and many mysteries still remain.
By Higashi-Mikawa Kyōjindō Shujin (東三河狂人堂主人)