Somehow I'd knew it'd come to this.
This type of article is exactly what you'd expect from The Drudge Report, and /. seems to be a bit late with the news (it was on Drudge last week).
Japan does not have the same cultural baggage about this you'd find in the west. There's no huge population that had the whole Bible and "Mark of the Beast" drummed into their heads. There's no conspiracy theorists. No persecution of Jews - even though they were an ally of Nazi Germany.
In WWII, for all the things the Japanese did during the war, they did not share the Nazi's attitude towards Jews. Chiune Sugihara saved many European Jews during the war by giving them visas allowing them to escape Europe via Siberia. The government and the military pretty much ignored the orders to round up and exterminate Jews coming from Germany, with the one exception of a ghetto being built in Shanghai. The Japanese did not run any extermination campaigns and pretty much left Jews in their sphere of influence alone during the war.
Because of this, the marking of individuals does not carry the same knee-jerk gut reaction there as it would here, and people in Japan would liken it to how Americans see the commonplace medical alert bracelets.