If the person hasn’t said anything about it themselves (ANY thing, relations, relationships, orientation, political views, etc), it might be better not to speculate. In Japan, such actions may be considered an invasion of privacy or the spread of false information.
Depending on the circumstances, this may fall under Article 230 of the Japanese Penal Code (Defamation), which applies when someone publicly presents facts that damage another person’s social reputation. The penalty can be up to 3 years of imprisonment or a fine of up to 500,000 yen.
Even if no specific facts are stated, insulting or publicly disseminate false information may fall under Article 231 of the Japanese Penal Code (Insult), which can result in up to 1 year of imprisonment, a fine of up to 300,000 yen, detention, or a minor fine.
Also, spreading false rumors can fall under Article 233 of the Japanese Penal Code (Damage to Credit by spreading false rumors / 虚偽の風説の流布), which concerns the dissemination of false information that harms someone’s reputation or standing. This can be punishable by up to three years of imprisonment or a fine of up to 500,000 yen.
Keep in mind.
I said I liked thinking shuuji did DMMD because he wanted to support his queer friend