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Japan ninja pupil will get high marks for writing essay in invisible ink


Eimi Haga became interested in ninjas by watching "Nintama Rantaro" on TV

Picture caption

Eimi Haga grew to become enthusiastic about ninjas by watching TV reveals

A Japanese pupil of ninja historical past who handed in a clean paper was given high marks – after her professor realised the essay was written in invisible ink.


Eimi Haga adopted the ninja strategy of “aburidashi”, spending hours soaking and crushing soybeans to make the ink.

The phrases appeared when her professor heated the paper over his fuel range.


“It’s one thing I discovered by means of a e book once I was little,” Ms Haga informed the BBC. “I simply hoped that no-one would provide you with the identical concept.”

Ms Haga has been enthusiastic about ninjas – covert brokers and assassins in medieval Japan – since watching an animated TV present as a toddler.


After enrolling at Mie College in Japan, the first-year pupil took a category in ninja historical past, and was requested to put in writing a few go to to the Ninja Museum of Igaryu.

“When the professor stated at school that he would give a excessive mark for creativity, I made a decision that I’d make my essay stand out from others,” she stated.


“I gave a thought for some time, and stumble on the thought of aburidashi.”

Picture caption

The essay, displaying the heated and unheated sections

Ms Haga, 19, soaked soybeans in a single day, then crushed them earlier than squeezing them in a material.


She then combined the soybean extract with water – spending two hours to get the focus proper – earlier than writing her essay with a fantastic brush on “washi” (skinny Japanese paper).

As soon as her phrases had dried, they grew to become invisible. However, to make sure her professor did not put the essay within the bin, she left a word in regular ink saying “warmth the paper”.


Ninjas defined

  • An individual who makes use of ninjutsu – an impartial sort of warfare – is a ninja
  • The ninja custom dates again a whole bunch of years to Japan’s feudal period
  • Ninjas had been specialists in espionage and technique
  • They had been popularised in US motion pictures equivalent to Enter the Ninja, however Hollywood’s depiction of ninjas may be deceptive
  • Supply: Ninja Museum of Igaryu

The professor, Yuji Yamada, informed the BBC he was “stunned” when he noticed the essay.

“I had seen such stories written in code, however by no means seen one achieved in aburidashi,” he stated.


“To inform the reality, I had slightly doubt that the phrases would come out clearly. However once I truly heated the paper over the fuel range in my home, the phrases appeared very clearly and I assumed ‘Properly achieved!’

“I did not hesitate to present the report full marks – though I did not learn it to the very finish as a result of I assumed I ought to depart some a part of the paper unheated, in case the media would someway discover this and take an image.”


As for the essay itself, Ms Haga stated it had extra fashion than substance.

“I used to be assured that the professor would not less than recognise my efforts to make a artistic essay,” she stated.


“So I wasn’t actually frightened about getting a foul rating for my essay – although the content material itself was nothing particular.”

Further reporting by the BBC’s Hideharu Tamura in Tokyo


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Media captionThere are only a few ninjas left in Japan, and Mariko Oi has met two of them



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