Talk:Sumiyoshi/@comment-44643636-20200802051339/@comment-45270667-20200923175344

Oops, i misread your question, but he is probably Tanjirou's like great-grandfather(or older than that) because Kokushibo has been a demon for a while, so you have to look back to the time where he was still human to find what time Yoriichi(Kokushibo's twin brother) was alive. Because Yoriichi gave his earrings to Sumiyoshi. Then you count the years and then divide he number by generations and boom you have who he is.