Are you confusing Haneda with Beijing?... The route awards were just issued last week, so I doubt that there have been any slot allocations just yet.
While I guess it's possible he is confusing the two, my guess is that The Goose doesn't believe that large numbers of O&D passengers will want to land at HND late at night and take off from HND very early in the morning.
Of course, the landing and takeoff times at HND must be late at night/early in the morning, as specified by the Japanese government. Right now, with the still suboptimal PEK times, the slot times at the two airports are very similar.