The Nikkei is reporting that the total number of HND-US slot pairs will go up to 12. 10 will be daytime slot pairs while the number of midnight slot pairs will go down to 2. To be split evenly between JP and US carriers. Net increase of two flights on each side.
Japanese link: http://www.nikkei.com/article/DGXLZO96490430V20C16A1NN1000/?n_cid=kobetsu