St Ignatius next to Sophia University in Yotsuya has this page with all the info you need.
Franciscan Chapel Center in Roppongi also has their Christmas and New Years mass info up.
scroll down a little for the mass info.
I will attend mass in Japanese at my smaller local parish because it wont be as crowded as the major English speaking churches. Full yes packed to the ceiling no.
I was a Christmas and Easter Catholic for a while and sometimes I didn’t even go on those days, so if you are in the same boat I was in please don’t receive the Eucharist unless you have been to confession first. St Ignatius is really good for confessions and has the sacrament available, with a multilingual priest, everyday from 5-7pm, check their website for more info.