Originally Posted by
joejones
I haven't seen any sources that say the nighttime slots will become daytime slots, just that the four nighttime slots will be replaced by five daytime slots and one nighttime slot. I believe that the allocation is up to the US DOT and the Japanese MLIT on each side.
According to the State Department, the four existing nighttime flights become daytime flights:
Under the proposed amendment, these four slot pairs would be transferred to daytime hours. In addition, a fifth daytime slot pair for scheduled service to and from Haneda would be added and U.S. airlines would be able to continue operating one nighttime slot pair. Several U.S. carriers have expressed strong interest in offering daytime service to Haneda, and their passengers will benefit from convenient access to downtown Tokyo.
http://www.state.gov/r/pa/prs/ps/2016/02/252608.htm