I believe this is because Japan works under a civil law system, which means that case law is subordinate to written law. This means that courts have much less power to impose their decisions upon the executive. Thus I think it is because the Japanese legislature never passed a law which explicitly allows for same sex marriage, the executive is allowed to deny these unions.
However this is based on a very surface level understanding of legal systems and I am by no means an expert. I find the language surrounding legal systems to be very confusing.
If you're really attached to that bed and TV placement you could also just use mirrors? Idk seems easier
According to Wikipedia St Valentine was a bishop in modern day Italy about 300 years before Islam even formed. So while that is a nice story I don't think it's true.