如何在香港仔出發到日航酒店?

Actually it may be easier for you to take the bus 107 ($10.6) and get off the bus right after the cross-harbour tunnel (i.e. PolyU). Then going to Nikko Hotel on foot should be a matter of 5 or 10 minutes. See the map of the hotel at:

http://www.hotel.com.hk/info/nikko_map.jpg