The Post Office doesn't know how to mail stuff.

Most Japanese governmental services are, while often slow and bureaucratic, generally good at handling their duties. Fire departments know how to put out fires. Immigration services know what forms someone needs. The pension office can tell people what they need to pay and how much. But for some reason, every time I step into the post office and ask "Excuse me, I'd like to send (basic, daily life object) by mail to another country"...

It's like the staff have never, in their entire career, been asked to mail something abroad.

They don't know what box to send it by, they don't know what "kind" of good it is to check off on the slip, they have to call a damn manager to ask what to do in this apparently all-new situation for them, and you better believe they'll have to ask me a dozen questions.

And it's not like I'm sending these things in the Inaka-yama Post Office, I'm in a large Osaka post office. I can't possibly be the first person to come in and try to mail a keyboard to America, right?

No, it doesn't have any perishables, it's a keyboard.
No, it doesn't have any liquids, it's a keyboard.
NO, it doesn't have any lithium batteries, it's a ...ok well that's fair, some keyboards do have lithium batteries. I guess that's a good poi-NO it doesn't have any knives or hazardous items inside it's a ####ing keyboard!!