Your source says its numbers are "generated with the unix command line tool ping", which reports round trip time.
In fiber, with light traveling at about (2/3) * c, the minimum latency from SF to Tokyo would be about 42 ms.
In fiber, with light traveling at about (2/3) * c, the minimum latency from SF to Tokyo would be about 42 ms.
The physical fiber optic floor from SF to Tokyo is about 50ms, point-to-point, with no sub-fiber last miles, wifi access points, or delay from routers and switches.
Actual user-to-user latency is much higher than that. Agora, for example, cites:
> Low latency, 400ms average globally