Japanese curry roux question

https://thelemmy.club/post/46306763

Go to a Japanese grocer and get the House Java curry blocks. It’ll pretty much ruin the golden circle roux cubes for you.
I’ve never heard of these products. What exactly is Japanese curry, and what does it taste like?
Imo it taste much better and the texture is better too, more “velvety”. There are variants of the photo that are sweeter/have apple flavour. I like the stock standard Java stuff. I added a link to the recipe I started with initially in the original comment since there’s a few of replies.