I would not drag around the hozon if I had the Haws just sitting there
Grimmy
The value of intimacy in using a can cannot be diminished unless you have, at some point, had shoulder surgery, carpal tunnel surgery and diabetic nerve damage. Combine that with a couple of hundred trees to care for watering becomes a daunting task that can become easy to ignore or not do well, especially if the weather becomes really hot. Unless you can maneuver a very large watering can you will need to refill numerous times in the process. It becomes un-fun very quickly.
I am not saying don't use a watering can but no matter how fancy and cool your Japanese watering can is and no matter what revered and ancient maker produced it, it is still just a watering can. Unless you have help or just a few trees, using a manual watering can is not only impractical it's counter productive.
I remember from my early days learning bonsai, some of the instruction and pictures from Yoshimura's book left an impression. I remember this lovely long necked watering can resting on it's side over a large cistern containing water for bonsai. The impression was "magical" I just had to have one of these watering cans. What I did not have, or even realize, this particular watering can was probably operated by a young apprentice or two that did all of the menial and labor intensive work around the bonsai nursery.
You would be best served by discovering the best methods for doing the tasks before you that go beyond the watering can. I think I mentioned it earlier a hose wand with the red nozzle works really well. These things are color coded, the red being the finest, and works really well.