Earnings
The grains you have stored in your house reflect on your earnings. If you earn a lot of money, you have more grains.
か
かせ
None
Another way to check someone's earnings is to see if they have a car (か). Would someone who doesn't make a lot of money have a car? No!
An update is needed before you can continue but you have more than one WaniKani tab open.
Finish up what ever you are doing on the other tab(s), then close them to continue.
The update will complete automatically once the other tab(s) are closed.