Because it's generic curry form a country that learned to make curry from bongs and yanks.
btw these premade block things are just flour, oil, MSG and curry powder. Learn to make your own roux and whatever curry you make from it will be better.
The Japanese don't seem to be a big fan of spicy. I usually get their "Red Hot"(?) golden curry, and it's very savoury, but there's no heat. The base for Japanese curry is usually carrot, potato, and sometimes apple I believe? I don't believe they use spices much hotter than Hungarian paprika. You can artificially raise the heat without altering the flavor too much by grinding some dried whole red chilis and mixing them in. Grinding whole dried will release the capsicum oils.
Because it's generic curry form a country that learned to make curry from bongs and yanks.
btw these premade block things are just flour, oil, MSG and curry powder. Learn to make your own roux and whatever curry you make from it will be better.
Japanese and white people have zero tolerance for spicy food and what's medium to them is "nothing" to anyone who has even the most base level of spice tolerance.