After the US and some European airlines, the Civil Aviation Bureau of Japan is announcing it's relaxing the rules of the use of electronic devices in planes.

Similarly to what some of you are getting used to, the use of all electronics during taxiing after landing is now authorized. More importantly, you shall be able to simply put your smartphone in flight mode—I can't count the number of times I was strongly directed to shut my iPhone completely off. 

The rule will enter into force on September 1. Restrictions will be maintained on older B767s, B737s as well as on Bombardier DHC8-Q300/100s and Saab 340s, so be sure to check what aircraft you'll be flying with.