Toshiba shows why all this is too little, too late for a corporate culture skilled at hoodwinking regulators.
This company, remember, already had outside directors before it started fiddling numbers. And it has yet to be bounced from the JPX-Nikkei Index 400 of companies lauded for "efficient use of capital and investor-focused management perspectives".
Prime Minister Abe's efforts to make companies more accountable have always lacked imagination and teeth. Toshiba is only the latest example of corporate chieftains running amok with scant accountability. How is it that the chief executive of deadly airbag maker Takata, Shigehisa Takada, still has a job? For the same reason no one went to jail for the US$1.7 billion Olympus fraud case in 2011 or Tokyo Electric Power and the negligence that has radiation leaking from Fukushima. Japan Inc answers to no one.
The absence of perp walks looks especially hypocritical after the Julie Hamp fiasco. Yes, the Toyota executive exhibited bad judgment in illegally importing the painkiller Oxycodone (considered a narcotic in Japan). But police arrested her, the media were on hand so TV cameras could document her humiliation, she was held for 20 days - during which time she "resigned" - and then they decided not to charge her.
The cops said they pounced because Hamp knew she was breaking the law. By that logic, why did Olympus leader Tsuyoshi Kikukawa avoid prison? (He got only a suspended sentence.) Or Masataka Shimizu, on whose watch Tepco fudged safety reports at its nuclear reactors? And why isn't Toshiba's Tanaka in a holding cell for at least the next 20 days?
It's this chronic permissiveness that Abe says he wants to change. If so, his Government needs to take off the gloves. It's astounding, for example, that Washington held hearings on Takata's faulty airbags and Tokyo still hasn't. Saying that's just not the Japanese way is unsatisfying.
Abe ignored the will of his people to make an end run around their pacifist constitution so that he can send troops overseas. Love him or hate him, this Prime Minister knows how to get his way.
He should start by naming and shaming retrograde chief executives. His Government should launch investigations that end in fines that hurt - and in jail time. Next, Abe should set a timeline to end the practice of cross-shareholdings between friendly companies.
With the yen down 35 per cent, you'd think acquisitive multinational companies would be rushing Japan's way. Barely a nibble, thanks to intricate takeover defences that Abe has yet to dismantle.
Then, kill off the corrupting practice of "amakudari" - literally descent from heaven. When bureaucrats bank on one day getting plumb, lucrative gigs in industries they oversee, they tend to go easy on offending executives.
Abe's push for more outside directors could actually accelerate the revolving door between public and private sectors. Chief executives might see it as a means to reward obliging Government officials.
By Abe's reasoning, the mere presence of outside voices will make Japan more competitive. But Sony has had outside directors for a decade, and it's spiralling towards irrelevance. Nor have outsiders halted the garish father-daughter brawl over control of furniture retailer Otsuka Kagu.
What matters more is that if chief executives can load boards with retired public officials, golf buddies and pushovers, governance reforms are purely cosmetic. And Toshiba shows how one company's negligence affects others.
If Tepco had acted more responsibly, Japan's nuclear industry wouldn't have been shut down in ways that eroded Toshiba's earnings. Toyota and Honda have been pulled into Takata's mess, too, announcing recall after recall.
Finally, Abe should take the bureaucracy down a peg and create a new corporate accountability board. It would be a drastic step for harmony-obsessed Japan, but one that's needed.
Entrusting the process to ministries and regulators reduces the odds that Abe's corporate governance revolution will succeed. Japan needs to get bold - and bring the handcuffs.