Japan Regional lock (Japan's Sub-GHz regulation)
Description of the feature you're suggesting.
TL;DR Anyone can operate [Extremely Low Power Radio Station] and [Specified Low-Power Radio Station] without license in Japan.
[Extremely Low Power Radio Station]: Extremely low tx power, only works in 5 meter range. There is no need for manufacture to get certificate. [Specified Low-Power Radio Station]: Low tx power, less than 1mW for continuous transmission. Certifficate required for devices, and needs to declare what frequency it using and what modulation it is using.
According to Telecommunications Bureau of the Ministry of Internal Affairs and Communications in Japan, there are two categories of Radio Station called [Extremely Low Power Radio Station] and [Specified Low-Power Radio Station] user did not require license to operate, first one has electric field intensity within 3 meters lower than certain amount in specific frequency range(approximate transmission range is 5 meters or less in real life scenario), and does not require device manufacture to get certification from administration (but suggested to get ELP certificate for qualifying device won't makes trouble to users but only for company registered in Japan to apply).
This does not acquire license to operate, no matter what frequency, what kind transmission modulation (e.q. AM/FM) and what usage.
ref: https://www.tele.soumu.go.jp/e/ref/material/rule/index.htm
Second one, does required "Technical Conformity Mark" and which Flipper Zero already have but Flipper Zero only has record on 312~315 MHz, and did not apply all other frequency.
ref: https://www.tele.soumu.go.jp/e/adm/system/ml/small/index.htm
These kinds of RF remote controller/devices are commonly in Japan.
ref(ELP certificate list): http://www.jaama.gr.jp/bijaku/summary/product-list.html
ref(ELP sample vendor product manual): http://www.kato-denki.com/download/manual/img/Bee700_users_KD.pdf
ref(Specified Low-Power Radio Station sample vendor product page): https://www.nomura-e.co.jp/products_ts02E_NH_PG.html
Anything else?
No response
Not only Japan but also Canada got same exception. We'll implement it at some point.
After some additional thoughts and emails with lab and certification authority we've decided not to implement exception. But we'll keep this in mind when design and certify next generation devices.