Algeria

1. Find a hotel in Tokyo for the next few days
2. Apply for an evisa for Vietnam.
3. Call your lodging in Vietnam and explain you’ll be a few days late. You’ll have to swallow any penalty and surrender any non-refundable nights.
4. Enjoy Tokyo
5. when you get your Vietnam e-visa, book a new ticket to Vietnam for the following day

Give yourself a little grace. These things happen and you know this won’t happen to you again now that the lesson is learned.

25 years of solo travel and I almost made the same mistake earlier this year in another country but caught it in time to cancel my airfare for a full refund.

You should understand that even if you can get away with using a VPN to mask your location, you’re still breaking the terms of your employment and are subject to whatever punishment your contract dictates.

You also don’t know if your university blocks VPN access. If they don’t they might wonder why you’re bouncing around various cities. And if your university provides email access, and you access said email with your mobile device(s), that’s another vulnerability that you need to address. Or if your ISP blocks VPN access. Or if the country (looking at you, China) blocks VPN access.

I know you didn’t expect the lecture. Just know that there are myriad ways this could backfire on you.