Good stuff Lieuz. I had this sad Kiyohime that some suggested that it would most certainly die in the near future. Had to chop about 40% of infected foliage off and let it be for about a year. Skip to 2014, leaves would shrivel up and die. Even though the potting medium was dense organic/peat moss based, I let it be and tried to do as little as possible until this spring (2015). I potted it in a smaller rice washer right as buds were about to open with 1 part pumice, 1 part lava, 1 part turfice, pinch of charcoal, and sprinkles of dry sphagnum moss on top. Nothing but green so far. I was a little apprehensive about using nothing but inorganic aggregate but so far it seems to be loving life. We'll see how the summer goes, I may have to add more moss to the top to keep the roots near the surface moist.
The picture is just as the leaves began to open about 3-4 weeks ago (some maples are early bloomers, some are late). I'll post an update of the foliage tomorrow.