From Haneda Airport:
Use Keikyu Airport Line to get to Shinagawa.
Transfer to Tokaido Shinkansen (use Kodama super-express if unsure, as only some Hikari super-express stop at Odawara) to Odawara.
From Odawara, take the bus operated by the hotel.
From Narita Airport:
Use Narita Express to get to Tokyo station.
Transfer to Tokaido Shinkansen (use Kodama super-express if unsure, as only some Hikari super-express stop at Odawara) to Odawara.
From Odawara, take the bus operated by the hotel.