It looks like the EC25 J is module is best for use in Japan per https://www.quectel.com/product/ec25.htm
but per List of LTE networks in Asia - Wikipedia It looks like those carriers use band 1, 3, 8, and band 28 and the EC25 E supports 1, 3, 8 so it should work although I dont understand the details (I’m guessing there must be a reason they have so many variants).
If you have access to run AT commands run the following: Network Registration Denied - +CREG: 0,3 - #5 by AndrewGifft and see what the results of the commands are.