After the video ended, he asked his students to raise their hands if they thought racism existed in Japan. They all thought of it as a uniquely American problem.
But before the netouyu put Dezaki in their crosshairs, sending him death threats and hounding his employers, previous employers and even the local politicians who oversee his employers, there was just a teacher and his students.
Dezaki began his final lesson with a 1970 TV documentary, Eye of the Storm, often taught in American schools for its bracingly honest exploration of how good-hearted people -- in this case, young children participating in an experiment -- can turn to racism.
Some 2chan users, perhaps curious about how their country is perceived abroad, will occasionally translate Reddit's r/Japan posts into Japanese.
When the "Racism in Japan" video made it onto 2chan, outraged users flocked to the comments section on You Tube to attempt to discredit the video.
Though the video was based almost entirely on a lecture that they had once praised, they asked him to pull it down.
"Some Japanese guys found out which school I used to work at and now, I am being pressured to take down the 'Racism in Japan' video," Dezaki posted on Reddit. I don't want to take down the video because I don't believe I did anything wrong, and I don't believe in giving into bullies who try to censor every taboo topic in Japan. " He decided to keep the video online, but placed a message over the first few sentences that, in English and Japanese, announce his refusal to take it down.
Here's the video: Also on Thursday, Dezaki posted the video, titled "Racism in Japan," to the popular link-sharing site Reddit under its Japan-focused subsection, where he often comments.
By this Saturday, the netouyu had discovered the video.
He carefully avoided the most extreme and controversial cases -- for example, Japan's wartime enslavement of Korean and other Asian women for sex, which the country today doesn't fully acknowledge -- pointing instead to such slang terms as "bakachon camera." The phrase, which translates as "idiot Korean camera," is meant to refer to disposable cameras so easy to use that even an idiot or a Korean could do it.