Involving infringement, whether you will become a defendant depends on whether the other party claims rights, that is, whether to sue or report to industry and commerce. Domestic trademarks that have been successfully registered can be found on the Trademark Office website. If it is a self-produced product, the trademark can be redesigned, as long as it is not the same as or similar to the previously authorized trademark. If it is a product that is purchased for sale, it is recommended not to sell it. Under the new trademark law that came into effect this month, penalties for trademark infringement have been significantly increased. The best way to avoid this risk is to register your own trademark and operate your own brand. Once someone uses the same trademark as yours, you can also ask them to take it down.