I bought new front and rear pads for mine about 6 months ago, EBC.
I thought the pads looked really low, but when I took the old ones out they were almost the same thickness as the new ones.
It seems that skinny pads are fitted in fat calipers, or the calipers expect thicker disks.
The end result is that a lot of caliper piston is visible, which on a car would suggest the pads are almost worn out, as with new pads on a car the piston is normally totally pushed back into the the caliper.
With the Inazuma it seems that is not the case.
I did make sure the new pads were the correct shape but they are in my desk at work, so I can't check the part numbers.
It was not a total waste of my time stripping the pads out only to find they did not need replacing, as they needed a really good clean.
The water/steam groove in all the pads was full of crud, to the top, the slider pins were dry, and the bit where the pad rests/slides in the carrier was also packed full of crud, and also dry.
I cleaned all the crud off the pad/caliper carriers, and sparingly greased.
I cleaned the slider pins of old tar-like grease, and re-lubed.
I scraped out the slots in the pads, carefully, using a small flat-blade screwdriver.
I sparingly greased the back of the pads where they contact the piston carrier.
The effect was very pleasant.
The brakes are now silent, progressive, and stop working when I stop applying them!