Recommended Reading (weekly)
The Quirks of Japan’s Opt-In Email Marketing Legislation
In 2009 the Japanese government changed its email marketing policy from an “opt-out” similar to the USA’s CAN-SPAM Act to an “opt-in” legislation that bears more resemblance to the stricter European Union regulations. There are various aspects in the “Regulation of Transmission of Specified Electronic Mail” legislation that must be noted by all email marketers with Japanese subscribers on their lists
Popover email sign-up forms: best practices and advice
Obviously a lot depends on context and application but experts report many websites seeing significant sign-up rate increases after implementing a popover.