How conservative the Japanese people really is? And the government?

They don’t tease or beat up cross-dressed people on the road.

“None of my business” is the common attitude.

They don’t bring around their mates everywhere, which means they don’t worry about being single, gay, or whatever because no one cares about whom others are having/ not having sex with.

How do you write a letter to your uncle who sent you money for your birthday outfit?

Moreover, buff guys are often avoided for their narcissism.

Yaoi

We don’t instantly tie it with sex when a father and his very young daughter are taking a bath together.

Why singing is good for your brain, even if you are no Beyoncé - The Washington Post

How do you see these below?

They don’t have the so-called “couple culture” seen in many Western countries.

This is a very vague question. But considering the asker’s comment on Mr. Nakajima’s answer, your interest seems to be in sex-related matters (I don’t think it’s the only indicator of conservative/ progressive, though).

How do I explain to my husband that my 19-year-old son has accidentally gotten me pregnant?

They were very similar to the bromance of today but accompanied by sexual intercourse.

I’ve heard it’s always the male side that is expected to take a move in some countries. It’s not the case in Japan.

They don’t have the value that “guys must be macho.”

How do I build muscle easily with isometrics?

Visual-kei

I sometimes feel people from the West are obsessed with those “gender” and “sex” things too much. Let’s think about something else sometimes. It’s unhealthy.

In the old era, gay relationships were very common and were even praised among the privileged social classes, such as Samurai and monks.

Have you ever had sex with your female cousin? How did it start?

It’s very common for a girl/ woman to ask a boy/ man to be her boyfriend.