I agree. If Japan does not embark itself in a sensible local fab expansion in the next years, who will buy litho systems from Canon in 2025?
China? By then the market for litho system that are still not banned, possibly 28nm and above, will be split between ASML and SMEE. Any ASML banned litho, will be banned also for Canon.
Korea? Well, to buy Japanese equipment does not seem to be their first choice
Taiwan? Maybe, but ASML is market leader there. TSMC buys ASML. And definitely nobody knows what Taiwan will do in 2025!
Europe? ASML is local incumbent here.
US? Maybe, but it's very risky to bet on US. They are very unreliable and unpredictable. There is no international rule or contract that can bind them: they just do what they want, the moment they want it. Maybe someone in US has promised Japan that they will buy Canon machines, this would make sense to avoid ASML monopoly, but anything can change few years down the road. And especially it is not clear how many fabs US is actually going to build for real in the next 10 years, and for which nodes.
Regarding ASML capacity, ASML currently has a capacity for 375 DUV systems annually...
...and it does not seem they are pushing very hard to increase that. Actually with all the geopolitical unknowkns and the start of a recession, I would be surprised if they invest in added capacity at this point.