On a personal note, I resent your tone and especially the sarcasm. It does not belong in this forum and such posts will be deleted in the future.
Now that we got that out of the way, we can focus on the issue at hand. You're still ignoring the fact that the subs were not set and pushing your stamina theory. Let's look at the facts:
- no backups or reserves set (players available on the roster)
- Japan put more effort into the game
- Japan used "let coach decide", which, well, let's your coach decide
- the game never entered the "blowout" mode due to scores being relatively close the whole game
When you factor in all these things, it's really not that unusual to get the kind of subbing that actually happened.