COE

Hello members
I am a bit confused about COE since I am “a Child of Japanese National” with Canadian passport trying to get a long term staying visa
I have visited Consulate General of Japan in Vancouver a few years ago but I didn’t apply back then, now I am looking at requirements and trying to figure out COE.
I know I can apply visa with or without COE and; however, if I apply visa without COE, do I still submit my bank statement and other necessary bank information when I apply visa?? I apologize if my question is unclear or gibberish. Or if I have incorrect understanding
Thank you