Akiko Amano, the sole Japanese judo referee at this year's Tokyo Olympics, has a full-time job that involves more heat and energy than a gold medal match: She is the first female head of a famed fireworks company whose history goes back 362 years.

When the Kagiya company puts on a fireworks display, which can attract more than a million spectators, Amano oversees about 100 pyrotechnicians. Although the required skills are quite different from those of a judo judge, Amano says she draws strength from her work experience.

"You work with danger hanging over yourself at fireworks events. In a pinch, you cannot judge and issue instructions to ensure safety of spectators and your craftsmen unless you are mentally prepared," Amano, 50, said.