@EllisDee @lanodan yeah which we also used up until we decided to start grounding our stuff. I still don't understand why Japan didn't also adopt it.

I understand why they don't need it but it certainly wouldn't hurt.

A lot of newer places in Japan do have grounding and just have outlets like this so you can use an adaptor if you need to. However I'm sure you can see how this is fucking stupid compared to just installing 3 prong outlets instead of doing this:
JP_15A-125V_socket-noGround.jpg
JP_ground-Adapter.jpg
JP_15A-125V_ground-Adapter.jpg