I’m less familiar with UK curries, but in general Japan tends to prefer sweeter food than India, so the curries would reflect those differences. Nowadays (in the last 5-10 years-ish) spicier options have become more widely available, but the traditional dishes still reflect the differences.
Cheese curry is pretty common these days. The cheap chains like Yoshinoya and Sukiya have it, as does Coco’s.
Is Japanese curry basically like the curry you would get from a chipper in the UK?
I’m less familiar with UK curries, but in general Japan tends to prefer sweeter food than India, so the curries would reflect those differences. Nowadays (in the last 5-10 years-ish) spicier options have become more widely available, but the traditional dishes still reflect the differences.