The self-produced film by faith leader Ryuho Okawa is woefully misjudged and reveals the laughable reality behind Happy Science

Here’s a biopic about a world-changing faith leader, a man who has published 2,500 books – according to his website – including accounts of his seances with the ghosts of world leaders. (Available to buy on Amazon: Margaret Thatcher’s Miraculous Message – An Interview with the Iron Lady 19 Hours After Her Death.) If you’ve never heard him, Ryuho Okawa is the founder and CEO of Happy Science, a religious movement that claims to have 11 million followers worldwide; some call it a cult. Now Okawa has executive-produced a long and incredibly leaden drama about himself written by his daughter, Sayaka.

If you’re going to make a film about yourself called Immortal Hero, hiring an actor with knee-wobbling charisma should be your number-one priority. But lead Hisaaki Takeuchi plays a self-help author called Makoto Mioya – an obvious stand-in for Okawa – with a blank-faced and catatonic presence. When he’s rushed to hospital after a heart attack, Mioya is told he won’t make it through the night. But he miraculously cures himself with the power of his mind. It turns out that Mioya has been visited his entire life by celestial spirits (they look like flickering holograms from an 80s kids’ TV series). Now these spirits command him to fulfil his destiny as the chosen one by unifying world religions. So Mioya abandons the self-help racket and branches into the lucrative business of religion.

Immortal Hero is released on 6 March in the UK.