Toyota does not see the future in electric vehicles. Their hybrids are a good stopgap but they aren't into EVs at the moment. If you look at their history they went from full electric (ie. Rav4 EV) to hybrids to fuel cells.
Aren't the fuel cells just an alternative to batteries for storing electricity in an electric car?
We'll also need major improvements in electricity generation and distribution. To charge a battery of ~300 kWh in roughly an hour, even over an industrial supply like three-phase 480V AC, would require in excess of 600 amps!
That's more than three times the maximum current a large, modern house can draw at 240V, and requires conductors over 1000 kcmil, or more than 1" diameter copper.
On an ordinary 15A, 120 VAC circuit, it would take an entire week to charge the car.
That might make fuel cells attractive. Never underestimate the bandwidth of a station wagon full of tapes, and never underestimate the energy transmission potential of a supertanker or freight train full of oil or hydrogen.
And importing electricity would be geopolitically very risky (it would have to be from China or Russia), but liquid hydrogen they can ship in from close allies such as Australia.
String wires over the Korea Strait? Undersea cables? The shortest distance from Korea to the Japanese island at the mid-point is 50km and from there to the mainland is even more (by eyeball).
https://en.m.wikipedia.org/wiki/NorNed
Edit: the engineering would be relatively easy, but the politics are the problem.