Japanese kitchen knives are a deep rabbit hole. They are far superior to their German counterparts. A big reason why is simply using harder and better steel. Familiarize yourself with the Rockwell scale. German steel tends to be softer which means it loses an edge quicker than harder steel, but is less prone to chips. While you might be able to take a Wusthof chef knives to a full chicken and risk it cutting hard through bones, you will not do that with a harder steel Japanese knife. But how often are you actually hacking through bone?
You can go nuts researching this shit, as I did. What works for me at least is ultimately when it comes to a main knife, and while I have multiple, you can often just rely on your one go to knife. That will most likely be an 8" Chef's Knife (gyuto) or a 7" Santoku. I find one of those will pretty much do 90% of what you do in a kitchen on any given day. If you are breaking down lots of boney meat carcasses, then you may want to look into a butcher style knife, in Japanese terms that is a Yo Deba, but for most of us that are just chopping lots of veggies and breaking down meat with little bone, one of those two knives will do pretty much everything. I will break down a whole chicken with my Japanese harder steel knife, I'll just be careful when cutting the joints to not try to smash through bone.
Then there are all different kinds of actual steel. VG10, SG2, carbon steel like blue #1 or white #2. Knives that are stainless and knives that you must dry very soon after usage so they don't rust. A lot of research to do there. A lot of people like the carbon heavy steels because while they rust easier, they tend to sharpen easily too. If you are willing to get a good whetstone and sharpen your own knives, that's a whole other world.
Ultimately for me, an 8" Chef's Knife (gyuto) is my sweet spot. I find it comfortable to wield for pretty much any kitchen task, small or large, whether dicing onions, mincing garlic, breaking down bell peppers, slicing meats. Usually a 7" Santoku or 8" Gyuto will do it for most people, though some might prefer a slightly smaller knife, and some guys online prefer a 10"/240mm gyuto. I think it's best to get one really really good one of those vs getting one of each though, whatever size is to your liking. It will do pretty much everything for you.
A well made Japanese knife will make almost anything feel like you are slicing through butter. Yu Kurosaki is a very well regarded knifesmith. Nigara is my end game SG2 knife. Honestly I could sell my other few good Japanese knives if I just kept my Nigara SG2 Kirtsuke 210mm (about 8"). That's all I would need for life if one took care of it.
I have ended up preferring like a 62-63 on the Rockwell scale. With a steel that can take to sharpening relatively easy for that hardness, doesn't need a polished finish, and just gets shit done.