That's a shame but in case you ever go, that's a thing to consider getting there. You'll have to get the eye test done there, maybe starkad can help you out. Apparently you don't need to know much Japanese. They actually make it VERY quick. Within the day if your prescription is just regular or in the video below it took 3 days.
This video explains the experience of getting glasses in Japan. It's pretty detailed :3
https://www.youtube.com/watch?v=zuTf0AXAEbE
edit:
I'm not 100% sure if OwnDays in Japan would have an english speaking optometrist but I believe they're one of the only japanese optom stores that have branched outside of Japan so maybe they're a better bet with English friendly staff.