そう思います

It is very simple to use. You don't need complex grammar. Just wait for an opinion. Then drop the phrase. You can add 私も (watashi mo) at the start. This means "I also think so." It makes you sound extra supportive. If you want to be very sure, add 本当に (hontō ni). That means "I really think so." It’s like giving a verbal high-five.

Use it in professional settings constantly. It makes you look like a team player. Use it with neighbors or shopkeepers. It is perfect for those "polite but friendly" moments. If you are texting a new acquaintance, it is a safe bet. It avoids any risk of being rude. Use it when discussing movies, food, or plans.

Don't use it for objective facts. If someone says "The sun is hot," don't say そう思います. It sounds like you are debating the sun's temperature. Also, with your siblings or best friends, it’s a bit cold. It’s like wearing a suit to a pajama party. Use そう思う instead. Don't use it if you actually disagree. That would just be confusing!

In Japan, keeping the peace is called wa. This phrase is a tool for wa. It avoids direct conflict. It focuses on shared feelings. It is less about you and more about the connection. It’s a way to say "I'm with you" without being too loud. Harmony is everything in Japanese conversation.

そう思う is the casual version for friends. そうは思いません is the polite way to disagree. そう思いました is the past tense. Use it when you already had that thought. そう思う？ with a rising tone asks for an opinion. It’s like saying "Don't you think?" It’s very versatile.