Although not specifically related to financial secrecy, this does seem relevant, via asiancorrespondent.com/AP:
“A proposed state secrecy law in Japan that imposes stiffer penalties on bureaucrats who leak information — and journalists who seek it — is spurring a public outcry, with opponents blasting it as a heavy-handed effort to hide what the government is doing and restrict press freedom.”
“The public’s top concern is that the government won’t say exactly what it wants to make secret. Critics say the law could allow the government to withhold information about whatever it wants and ultimately undermine Japan’s democracy.”
Japan is ranked 10th on the 2013 Financial Secrecy Index.