And that's only my Japanese naturals! I have a Chinese Natural, 3 different Diamond stones and a whole slew of synthetics!!
Better shot of the Aoto's, left is the 1-3K, right is the 3-5K, much harder and finer than the softer Aoto. The level 2 Hakka is the one with the rings in it and the larger one to the right is a bit harder and finer grit, Hakka Renge Suita and has a purplish coloring to it:
2 hakka's on the left, Yaginoshima Asagi in the middle with the light and dark, San shobu the long skinny one, feels very close to the Yaginoshima Asagi, leaves a very fine, wickedly sharp edge with some tooth to it. The one on the far right is the level 3 narutaki, "Nakayama Narutaki honyama shouhonzan aka" is the full name. Narutaki is easier to remember
Back to the first pic; the smaller one on the bottom row to the left of the big Meara in the first pic is a "hideriyama ocher suita" level 3. The longer, harder Narutaki on the wooden base in the first pic is a "Nakayama Narutaki honyama shouhonzan suita" and level 4 for hardness. The Ozuka Asagi (far right stone in first pic) is my hardest and finest J Nat at around a level 5 (+). It gives a very refined edge with a bit of tooth to it, but I prefer a toothier edge for most tasks. The larger Takashima in the first pic is a level 4 Takashima Suita, not sure about the smaller koppa Takashima.
As you can see, I like stuff in the level 3-4 range normally, they are soft enough to work well with kasumi finishes w/o being scratchy and they leave a very refine tooth on the edge that seems to last quite a long time!