Plow
You have a plow and a (water) well. These are the two things you need in order to plow.
こう
たがや
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Plowing all the fields are こういちs. Not Emperor こういち. These are the こういち clones the government made, and now they're being put to use.
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.