Yes it is, you will not be allowed to go in.

I think most of it closes around 10pm there will be a few open til midnight then there are hot food vending machines .

Merry Christmas! As mentioned previously, best option would be ot contact the Onsen with your questions, however, I don't think there would be an issue with bringing slippers as none are provided by the Onsen. I can't answer the luggage storeage question, but there are luggage delivery services from hotels that can ship you bags to the airport. Don't taxi it to the airport as it's about an hour away and expensive! Limousine bus goes from the Hilton nearby to Narita but the last bus is about 5pm. Train may be your only late night option. The Onsen runs a shuttle bus to Tokyo station and you can get a train direct to Narita from there. Alternatively, there are onsen near the airport but I am guessing you want the Ooedo onsen experience... I hope this is of help to you!

HI Amie, I can't guarantee my answer to 100% but the Onsen should be open. I checked the website as well and it keeps coming up as open 7 days a week. Just remeber the timings, last entry at 0700, closes at 0900 for cleaning and reopens at 1100. I belive that if you're in there at 0900, you can stay but just need ot be out of the way of the cleaners. Also, being public holiday I am pretty sure they will be open as it will be a busy time for them. That also means it will be crowded for your visit. I have done both crowed and uncrowded visits and crowded is still fun! Go early or late and just be aware they may run out of some foods like the Karage fried chicken. Hope this helps you, it's a great place to visit.

Hi Melissa, once you get inside the Oedo onsen ask the front desk about the reservation for massage.

From what I know of Japanese Baths, I don't tink Winter will close the foot bath. It certainly won't freeze up but sitting on the edge may be a bit cold. I imagine it might be more spectacular with a bit of snow around it. Weekdays have lesser crowds from our experience and of the two days we went, one was a Wednesday which was relatively quiet, the other was a public holiday and it was busy, but not unbearably so. Theere are a couple of videos on Youtube about it and they are worth seeing. Hope this helps and either way, you and the kids will love the place.

You may by using a band aid patch, but they may let let you use the actual bath, thinking you might have an open wound. If it's hidden on the body, where your yakuta will cover it, you will likely have no problems with everyhting else but the actual bath. This is a family place and they are serious about tattoos. Google Tokyo onsen that accept tattoos asthere are a number that will.

No. Only for the theme park will you receive a wristband at check-in for any food or games you want and pay at checkout.

Like most of the Japanese onsen they have a policy against tattooed people. It’s on the website.