At a bustling Tokyo flea market in late September, booths were filled with manga, self-published magazines, books, accessories and other goods. The crowds that gathered included women in "cosplay" outfits and men in animal costumes, while the poster promoting the event featured a manga-style girl in school uniform.

If not for the slogan on the poster — "Go for it! Our religious reform!" — passersby would have thought it was just another event for the manga crowd.

Instead, it was a Christian outreach tailored to modern Japanese sensibilities.