The 12/12A/12X buses are full of Japanese tourists, who have the Seven Sisters park & Cuckmere valley, on their itiinery. It is actually recommended for a visit back in Japan.
http://www.theargus.co.uk/news/15432593.Brighton_s_newest_thrill_seeking_seafront_attraction_opens/?ref=mrb&lp=2
It's only £8 if you do the instant drop, thing.