It's possible that the factory (Japan Automatic Transmission Company, JATCO) don't like dipsticks or find the term "dipstick" offensive (maybe they watch Alf on Home and Away yelling at "those f---in dipsticks!" ).
Anyway, they stopped using "normal" dipsticks somewhere around 2009 and went for a small bolt that holds the cap down, you can draw that out and it's a real dipstick - just not one that your average punter can deal with.
They probably discovered that we could still tell how much oil was in it, and in an attempt to render the gearboxes more vulnerable, removed it altogether and developed a complicated means of filling them so that more gearboxes would fail, more could then be sold, and they would make more yen. The following description of checking the oil level is NOT a joke.
There are two "bolts" underneath in the bottom of the transmission sump. One is the drain and the other is the filler cap. If you remove the filler cap (with a container underneath) after getting the gearbox to 40 degrees celcius, there should be a very slight drip of oil from the filler.
Yes, it fills UPWARDS.
If it's hotter, more oil will flow out than it should. If it's colder, you'll end up with too much oil in the box.
And no, you can't turn the car upside down and fill it that way.
