Aogami #2 is basically white carbon steel with a bit of chromium and tungsten for added toughness. This is very hard carbon steel, and it will therefore have long edge retention.
Special care must be taken with carbon knives as they are reactive and prone to rust. Make sure to wipe off the blade regularly during use as well as wash and dry it thoroughly when you're done. However, after a nice strong patina has formed on the blade they are less likely to rust. Patina is your friend!