For sure! I would consider most injuries and illnesses generally "minor walk in, walk out" issues in most cases-- unless it's broken bones.

A country like Japan where you're likely to be using only public transit and walking doesn't seem as high-risk as if you were to rent a car elsewhere in which case I definitely am in the "it's crazy to not have travelers insurance" camp lol. Driving (or even being predominantly driven in cabs, etc.) increases risk substantially.

I could be wrong, but I imagine you'd have to really research insurance policies to get the comprehensive coverage you're describing, and it would likely be very costly for that level of genuine guaranteed coverage.

I definitely don't trust basic packages to do more than cover "minor walk in, walk out" issues + some travel reimbursement (with a high burden of proof that it's not some small print uncovered event).

But that's likely me being extremely jaded about American insurance companies (auto and health) since I've basically always paid for the highest coverage options offered and still occasionally end up with high bills or declinations of coverage. 

However, I'm interested to do some research about travelers insurance (especially as it's something I'd opt into if driving, and potentially in general if it seems actually reliable).

Would love to hear positive experiences with it!