One of [the DPJ's Ritsuo] Hosokawa's proposals that Shiozaki did not agree to was eliminating a clause requiring foreigners to carry residence ("zairyu") cards.
"We can't give in on that," Shiozaki said. "Carrying green cards is mandatory in the Unites [sic] States as well."* Japan Times
An excellent reason! No simpleton he. It is always impressive to see a politician with his own moral standards and irrefutable logic.
Unfortunately, Pot-Iron Shiozaki did not mention why the penalty for not carrying the card in Japan would be so much higher. There is, however, little reason to believe that money from the huge fines to be imposed will be used to pay for a Japanese war with Vietnam and its future invasions of a few Middle Eastern countries. The US, after all did those things, and Japan is already late.
There is also no truth to rumors that Shiozaki is spearheading efforts to give non-Japanese rights equal to those of permanent residents in the US or to introduce legal penalties with teeth---again like those in the US---prohibiting racial discrimination. Unfortunately, the interview ended before the reporter could ask when Shiozaki planned on pushing for an amendment to the Japanese constitution to allow citizens to possess firearms.
And can you believe that Hosogawa said these words: ..."illegal foreigners who are as good a citizen as ordinary Japanese"...My god, we can't let the DPJ win with members like him running around! This article and full in-context quote is here.
*I wonder---if the US repealed it's law, would Ol' Iron Balls support repealing the Japan version?