According to the Pixel 4’s Best Buy landing page, Motion Sense will not work in Japan. Instead, Google will enable the feature in the U.S., Canada, Singapore, Australia, Taiwan, and “most European countries.” We don’t know why Motion Sense won’t work in Japan, though it could be due to Google not yet getting permission to use Soli in a consumer product in the country.
Announced in July as a Pixel 4 feature, Motion Sense uses the Soli radar for touchless gestures. For example, you can skip songs, snooze alarms, and silence incoming phone calls with a wave of your hand. Face Unlock also uses the Soli radar to turn on the Pixel 4’s two face unlock sensors and unlock the phone as quickly as possible.
We should learn much more about the Pixel 4 very soon. Google historically hosts its hardware events in October, with the Pixel 3 and Pixel 3 XL announced October 9 last year. Leaked information from Verizon suggests Google will stick to the October schedule for its upcoming flagship.