Number keys not working on wireless keyboard.
I have a wireless Japanese keyboard like the one below. I'm operating on the latest version (10.10.5). Today the number keys stopped working. To my knowledge I didn't damage the keyboard in any way. So far I've tried:
-checking that mouse keys were disabled (they were)
-changing batteries
-turning on / off the keyboard
-turning on / off the bluetooth connection to the keyboard
-every shortcut I could think of with the command, option, shift, control, & function keys including all the F keys, delete, & eject
-adding / changing languages
-starting in single operator mode & safe mode
-logging in with a different account
-checking the slow key mode
Also, when I hold the fn key and press 5 6 in sequence it spaces. fn and 4 5 the ¥ comes up. 0 as well as everything right of 0 still working.
I've brought up the KEYBOARD VIEWER so that I'm able to type numbers and the shift symbols on them but I've tried everything I could find online so far. Any new thoughts?
iMac, OS X Yosemite (10.10.5)