fishing for sweetfish, catching ayu / the type of hook used to catch sweetfish / Japanese fluvial sculpin (Cottus pollux) / fourspine sculpin (Cottus kazika)

Alternative spelling of 振り掛け

illative case (case used to indicate movement into something)

Kyūjitai form of 収入: income, earnings, receipts

insight / penetration (of a problem)

to have an insight / to penetrate a problem

to fall in, to cave in

falling in (like a cave in), collapse

toolbox

OFF/ON (on a switch)