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

“None of my business” is the common attitude.

Visual-kei

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

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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).

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

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

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

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

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Moreover, buff guys are often avoided for their narcissism.

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

Yaoi

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How do you see these below?

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

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.

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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.