I'm not saying that katsu kare is not existent in Japan, but in the UK it is basically the only kare you can get. On the contrary in Tokyo you have it among ten

I'm not saying that katsu kare is not existent in Japan, but in the UK it is basically the only kare you can get. On the contrary in Tokyo you have it among ten other options and it is definitely not the most popular one. I can say only about my experiences but I'd say the most popular is one with beef which is put in the stew. The name of the dish is simply kare rasiu (curry with rise) and that's most common form. It's also super simple to make if you have rice cooker at home. Just pre-fry some onion, carrot and potatoes on the pan, then boil it with considerate amount of water and add curry blocks to it - done. You may add meat but it's just an additional ingredient which can be easily omitted. You can make it once and it lasts for couple of days. You can even freeze it if you want.