Last year, I was told that Maruzen Marunouchi will have some stuff for the 10th anniversary of the Oazo building where their Marunouchi store is located.
I have no idea if anything has changed due to the pandemic.
It seems that there will be also a Nakaya pen for this event - a LE to this store.
Nakaya published pictures of that pen on their facebook site:
220000 Yen including tax