Would be perfect post end of January for next FOSDEM.
For Tokyo, https://minitokyo3d.com/ is just based on a static GTFS file. Or is it realtime? Nobody knows the difference. (I'm joking. Local trains in Tokyo area are late quite often. Doesn't matter much when there's one every <5 minutes though.)
Sorry, wrong reply button, meant to add that here: https://news.ycombinator.com/item?id=49596821 sigh