>>2836171
If you mean you don't casually strike up small talk with strangers at a café or smile at everyone in the streets, sure. It's the same here in Finland, we suspect you're either a maniac or a conman, and at the very least you're inconveniencing others.
Inconveniencing others is the thing to avoid. When you have the occasion to interact with them, the Japanese are extremely helpful and kind. Though this too is just surface level hospitality not too different than when an American greets you "how you're doing, it's nice to meet you". Finns don't speak if they don't mean what they're saying.