Long layovers and flight schedules

I have been ignoring my blog lately the past few days due to some heavy workload. I am still in california and i am supposed to return from here on the 12th of this month. Looks like i will be having a long layover of 18 hours at the tokyo airport and airline agents just confirmed that they cannot provide hotels during that time.
So if anyone knows any good places inside the narita aiport to sleep for 18 hours do let me know.