Japanese Maple is a recently released lipstick at MAC. It was part of the Cremesheen+Pearl collection, but I do believe all the shades were going to be added to the permanent collection.
Japanese Maple is a slightly brown nude. It has a glossy finish, as all the Cremesheen formula lipsticks do. It isn't totally opaque, but can be built up.
As a person who is a little afraid of nude lipsticks, this one isn't scary in the slightest. It doesn't wash me out or make my lips disappear. It has enough brown/red pigment to be flattering.