I highly recommend setting aside an hour after checking the bags in to go to the onsen at the hotel in the Airport Garden complex attached to Terminal 3. It's around 4800 yen but worth it for the sleep you'll get on the flight. You can't take cabin bags up to onsen which is on the top floor of the hotel but you can put them into luggage storage at the information desk near the hotel entrance.
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The Villa Fontaine also does day use rooms at a reasonable cost, and onsen access only costs and additional 2000 yen for hotel guests.
If travelling in a pair I think the day use room + 2 pax onsen access is not much more than buying onsen access for 2 non-guests. The upside being you can just leave all your luggage in the room.
Thanks for that information. I have a 10pm departure tonight and I checked availability for today. A day room for 8 hours with onsen access was AUD80 more than just getting an onsen ticket and checking bags in at the info desk. That's a good deal.
The Villa Fontaine also does day use rooms at a reasonable cost, and onsen access only costs and additional 2000 yen for hotel guests.
If travelling in a pair I think the day use room + 2 pax onsen access is not much more than buying onsen access for 2 non-guests. The upside being you can just leave all your luggage in the room.