Japanese Student Gets an A with Stealthy Report on Ninja Culture
Mon, April 19, 2021

Japanese Student Gets an A with Stealthy Report on Ninja Culture


A professor gave 19-year-old Eimi Haga a well-deserved A on her assignment about ninja culture even though the student submitted a blank report.

Yuji Yamada, who teaches Japanese History and ninja culture at Mie University, asked his class to write an essay on ninja culture. He promised extra credit for those who submit their work with creativity—and Haga delivered.

The student's essay was about her a visit to a ninja museum along with a message to her teacher. According to Young Post, the youths' section of the South China Morning Post, Haga told him to heat the essay prior to reading it.

Yamada took her essay home and carefully heated the paper using a stove, slowly revealing his student's essay. The teacher was more than impressed and with the promise of an extra mark, he awarded Haga an A on the activity.


19-year-old Eimi Haga / Photo Credit: AFP via Young Post


"She replicated what is written in records about ninja writing," Yamada, as quoted by Young Post. "She proved it actually works and she went through a trial-and-error process."

Haga wrote her essay with her own invisible ink made from soybeans, which she soaked overnight and squeezed to make a paste. She tested the ink on three different kinds of paper to find the perfect sheet that would absorb the ink and not burn up when heated.

"If the paper is too thin, it burns when heated. If it’s too thick, it doesn’t absorb the ink very well," she said.

When he tells his students to be creative, Yamada said the works are usually submitted in the form of scrolls or are folded into throwing stars. He said that they once discussed the use of invisible ink, but he was still "amazed that someone actually used it."


A ninja / Photo Credit: Guayo Fuentes via ShutterStock


The ninja culture teacher added that he didn't read Haga's entire peace as he wanted some of the work to remain invisible.

"By learning about ninjas, we can apply their knowledge and ways to modern society," Yamada said.