veggie japan hacks #2: curry (カレ)

Seijo Ishii makes a brand of vegetarian curry roux for Japanese style curry (it says on their site as well as in the store that it's suitable for vegetarians). It's one of the only ones I've found in Japan that does this - all the other ones have meat in them.

The packet looks like this. 

 S&B also makes one in a cool red tin that seems to be safe. It expressly states that it doesn't use beef, and I can't find anything in the ingredient list that says that it uses any meat.

It's the curry mix, not the curry powder.

I'd love to figure out how to make kare from scratch. Does anyone have a good recipe? I can do Indian masalas a bit but sometimes you just want Japanese-style curry.