When the customer have some extra money to spend , the Jap car dealer must find something to sale to them in order to match the money, Then ABS to Jap car is one of these "Money-exhost" parts. Jap is good at electronic and plastic and market skills. If something connected with computer especially software, they know nothing. You can easily find lots of friends, who worked in Japan as software programmer for many years, They are real experts in that country, but their software develop knowledge and skills is only high school level of Indian. Unfortunitily, ABS is a system with lots sensors and some software. So...
Another populor parts is so called "spoiler"(This kind of junk parts also can be found on most of GM's Sunfire and Honda's CIVIC, so it's not a Jap only issue), The dealer can tell you, it's safe and made the car most stable, But the fact is the insurance company don't think so, and they will change extra fee for these kind of "safety" features.