USB outlet plugs in Japan

Hey !Japan,

I’ll be visiting this country for the first time in a few weeks. I know Japan uses different wall outlets than my country, so I was debating about buying adapters, or waiting and buying USB plugs when I get there.

All of my devices can be charged by either USB A or C, and I was wondering if anyone could share their recommendations in this regard.

Is it easy to walk in to any convenience or electronics store and pick up a couple chargers for cheap? Would you recommend this over buying some travel adapters ahead of time?